EP3997412B1 - Pyrotechnische zündpille sowie verfahren zur herstellung einer pyrotechnischen zündpille - Google Patents

Pyrotechnische zündpille sowie verfahren zur herstellung einer pyrotechnischen zündpille Download PDF

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Publication number
EP3997412B1
EP3997412B1 EP20734175.1A EP20734175A EP3997412B1 EP 3997412 B1 EP3997412 B1 EP 3997412B1 EP 20734175 A EP20734175 A EP 20734175A EP 3997412 B1 EP3997412 B1 EP 3997412B1
Authority
EP
European Patent Office
Prior art keywords
housing
terminal contacts
pill
glass
outside
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
EP20734175.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3997412A1 (de
Inventor
Simon BETSCHER
Markus Moszynski
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.)
Auto Kabel Management GmbH
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Auto Kabel Management GmbH
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Publication date
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Publication of EP3997412A1 publication Critical patent/EP3997412A1/de
Application granted granted Critical
Publication of EP3997412B1 publication Critical patent/EP3997412B1/de
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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
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • 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
    • F42B3/12—Bridge initiators
    • 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
    • F42B3/125—Bridge initiators characterised by the configuration of the bridge initiator case

Definitions

  • the subject matter relates to a pyrotechnic squib and a method for producing a pyrotechnic squib.
  • Pyrotechnic squibs themselves are well known. Examples of this can be found in DE 44 29 175 A1 , DE 10 2017 130969 A1 , JP H05 220380 A and JP H05 172497 A . Such squibs are often used industrially. Particularly in automotive applications that are safety-critical, a belt tensioner, an airbag, an electrical breaker, etc. is often triggered using pyrotechnics. A squib can be used as a gas generator or as a propellant charge. In particular, for cutting current-carrying electrical conductors, a sufficiently high separation energy is necessary to ensure safe separation of the conductors in the event of a crash.
  • the ignition charge is hermetically secured in a housing and ignition occurs via two wire contacts, which are led to the outside through a glass bushing.
  • the ignition contacts are wire-shaped and round.
  • the object was therefore based on the task of making a pyrotechnic squib available for electronic connector housings.
  • a glass pill is encased in a sleeve/ring.
  • the connection contacts are passed through the glass pill.
  • the glass pill is melted so that the glass nestles against the connection contact in a gas-tight manner.
  • a cover is welded to the sleeve/ring and within the cover, connected to the connection contacts, is an ignition charge.
  • the glass bushing including the cover and sleeve/ring form a housing for the squib, which hermetically encloses the igniter charge. Hermetic protection is in particular liquid and/or gas tight.
  • connection contacts are electrically connected to the ignition charge within the housing, so that the ignition charge can be triggered via an electrical ignition pulse and explodes.
  • the gas-tight and/or moisture-tight glass bushing ensures that the ignition charge does not come into contact with moisture, even over a very long service life, and therefore always remains ready for use.
  • connection contacts in the area of the ignition charge have a round cross-sectional profile and that the connection contacts outside the housing have an angular cross-sectional profile.
  • Angular in the following sense can be understood in particular in such a way that at least two side edges run parallel to one another in the cross-sectional profile. There may be a certain ovality in the transition to the adjacent side edges.
  • connection contacts are formed from round wires and are plastically deformed outside the housing.
  • the round can be made Cross-sectional profile is formed at least along two side edges so that it becomes angular.
  • connection contacts have a first contact distance from one another in the area of the glass feedthrough and outside the housing have a second, larger contact distance from one another than the first.
  • the connection contacts can therefore be spread apart and have a greater distance from one another. This allows the contacts to be inserted into openings provided in connection plugs.
  • connection contacts run straight and parallel to one another in the glass feedthrough and, outside the glass feedthrough, run at an angle to one another in a central section and again straight and parallel to one another in an end section.
  • the connection contacts are deformed in such a way that they point away from each other. However, in their end sections they can be deformed again so that they run straight and parallel to one another.
  • connection contacts are guided through two glass feedthroughs lying opposite one another.
  • a glass feedthrough can be arranged on the cover and on the base of the housing.
  • the connection contacts can each be routed through one of the two glass bushings.
  • connection contacts outside the glass feedthrough are bent away from one another.
  • the bend begins at a distance of at least the radius of the connection contact from the glass feedthrough.
  • the connection contacts are arranged as wires within the glass bushing, running parallel to one another. Bending must not place any mechanical stress on the glass bushing, otherwise it could shatter.
  • the bending of the connection contacts only begins at a distance from the glass feedthrough. This distance is preferably at least corresponding to the radius of the connection contact. As a result, bending moments and/or bending stresses can be adequately absorbed and deformation of the connection contact within the glass bushing can be avoided.
  • the glass feedthrough has a glass pill and a support ring.
  • the glass pill is melted and the melted glass nestles against the connection contacts.
  • a cover of the housing is arranged in a materially bonded manner on the support ring, in particular welded on.
  • the ignition charge is arranged inside the cover.
  • the connection contacts are short-circuited to one another via an ignition wire that runs within the ignition charge.
  • An electrical ignition pulse flows over the ignition wire, which is heated by the ignition pulse and thereby ignites the ignition charge.
  • connection contacts are guided in a connection housing on the side of the glass bushing opposite the ignition charge.
  • the squib can have a housing which has the squib.
  • a further housing can be provided, in which the connection contacts are guided and which is shaped as a plug face. The plug face fits a prefabricated plug contact and can be plugged into it.
  • the connection contacts can be guided and bent within the connection housing.
  • connection housing is made of a plastic, in particular injection molded.
  • the connection housing is molded onto the support ring.
  • the angular cross-sectional profile is formed by two longitudinal edges running parallel to one another and two transverse edges lying opposite one another, the transverse edges being formed in an arcuate shape, in particular in a convex-arc shape. In cross section through the connection contacts, these can be approximately oval with two side edges running parallel to one another. This can be understood as angular.
  • Another aspect is a method for producing a pyrotechnic squib.
  • a housing is first provided with an enclosed squib with at least two connection contacts led out of the housing through a glass bushing.
  • the squib is then mechanically fixed and the connection contacts are mechanically deformed outside the housing, on the side of the glass bushing that is opposite the ignition charge, such that the connection contacts outside the housing have an angular cross-sectional profile.
  • the angular cross-sectional profile is obtained by pressing.
  • connection contacts can be bent apart outside the housing. It is possible, for example, to fix the connection contacts and bend them apart at their free ends. The fixation preferably rests directly on the glass bushing and thus prevents forces introduced by the bending from reaching the glass bushing.
  • Fig.1a shows a pyrotechnic squib 2 in a side view.
  • the pyrotechnic squib 2 has a housing 4 and a connection housing 6.
  • Connection contacts 8 are led out of the housing 4 and the connection housing 6.
  • a pyrotechnic ignition charge is housed in the housing 4.
  • the connection housing 6 receives the connection contacts 8 that are led out of the housing 4 and leads them to the outside, as in the Fig. 1b is shown in more detail.
  • the housing 4 is shown in a section.
  • the housing 4 comprises a two-layer cover formed from an outer insulation layer 4a and an inner metal layer 4b.
  • an ignition charge 10 which can also be formed from an ignition charge 10a and a propellant charge 10b.
  • the metallic layer 4b of the cover 4a, 4b is welded all around with a ring 12.
  • the ring 12 accommodates a glass feedthrough 14.
  • Two connection contacts 8 are guided in the glass bushing 14 and run parallel to one another.
  • a ring 12 is first equipped with a glass pill.
  • the connection contacts 8 are inserted through the glass pill.
  • connection contacts 8 are electrically short-circuited to one another via an ignition wire.
  • the ignition wire runs through the ignition charge 10, in particular the ignition charge 10a.
  • the cover 4a, 4b is placed on the ignition charge 10, in particular initially with the metal layer 4b.
  • the metal layer 4b is welded all around the ring 12, for example laser welded.
  • the insulation layer 4a is then put on and the connection housing 6 is molded around the “naked” igniter.
  • the squib is now ready for use.
  • the igniter charge 10 is hermetically shielded by the cover 4b and the glass bushing 14 and is therefore enclosed in a gas-tight and/or moisture-tight manner from the environment.
  • connection housing 6 is molded onto the housing 4, for example by injection molding.
  • connection contacts 8 run parallel to one another within the glass bushing 14.
  • connection contacts 8 are bent apart, but again run parallel to one another outside the connection housing 6.
  • Fig. 2a , b show essentially the same elements, with the connection housing 6 according to the Fig. 2b is provided with an O-ring 6a so that it can be plugged into a socket in a moisture-tight manner if necessary.
  • connection contacts 8 In contrast to that Fig. 2a is in the Fig. 2b the bending of the connection contacts 8 is discontinuous, so that the connection contacts 8 diverge in a V-shaped corner.
  • connection contact 8 The squib 2 is fixed to the connection contact 8 before or after the connection housing 6 has been molded on.
  • the connection contacts 8 can be fixed by grippers directly above the glass feedthrough 14. Pressing tools can then press the end regions of the connection contacts 8, which lie outside the connection housing 6 in the finished product, so that cross-sectional profiles are as shown in FIG Fig. 3a, b shown, form.
  • Fig. 3a shows the cross-sectional profile of the connection contacts 8 within the glass bushing 14. It can be seen that the connection contacts 8 are round. This results in particular from the use of connecting wires for the connecting contacts 8.
  • connection contacts 8 By pressing, the connection contacts 8 become as in the Fig. 3b shown brought into an angular cross-sectional profile outside the connection housing. It can be seen that two opposite side edges 8a run parallel to one another. The short edges can also run parallel to each other, but can also be convex. In the Fig. 3b It can be seen that the connection contacts 8 have a certain ovality in their cross-sectional profile, which is also to be understood as angular in the objective sense.
  • Fig. 4 shows the squib 2 in a view. It can be seen that the connection contacts 8 are formed as flat parts outside the connection housing 6. This is done by pressing the connection contacts 8 using pressing tools.
  • Fig. 5 shows the course of a given procedure.
  • a squib 2 is made available (20).
  • the squib 2 is then fixed (22) with gripping arms, for example by fixing the connection contacts 8 directly at the exit from the glass bushing 14.
  • an end region of the respective connection contacts 8 is pressed using a pressing tool (24).
  • the pressing tool can have lateral limit slides so that the connection contacts 8 have a defined width after pressing.
  • connection contacts 8 can be bent outwards, as in the Fig. 1b and 2 B is shown.
  • connection housing 6 can then be sprayed on in step 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Air Bags (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
EP20734175.1A 2019-09-05 2020-06-22 Pyrotechnische zündpille sowie verfahren zur herstellung einer pyrotechnischen zündpille Active EP3997412B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019123755.6A DE102019123755A1 (de) 2019-09-05 2019-09-05 Pyrotechnische Zündpille sowie Verfahren zur Herstellung einer pyrotechnischen Zündpille
PCT/EP2020/067312 WO2021043455A1 (de) 2019-09-05 2020-06-22 Pyrotechnische zündpille sowie verfahren zur herstellung einer pyrotechnischen zündpille

Publications (2)

Publication Number Publication Date
EP3997412A1 EP3997412A1 (de) 2022-05-18
EP3997412B1 true EP3997412B1 (de) 2023-12-20

Family

ID=71120179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20734175.1A Active EP3997412B1 (de) 2019-09-05 2020-06-22 Pyrotechnische zündpille sowie verfahren zur herstellung einer pyrotechnischen zündpille

Country Status (8)

Country Link
US (1) US11480415B2 (es)
EP (1) EP3997412B1 (es)
KR (1) KR102423717B1 (es)
CN (1) CN114341589B (es)
DE (1) DE102019123755A1 (es)
ES (1) ES2975110T3 (es)
MX (1) MX2022002246A (es)
WO (1) WO2021043455A1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1025276S1 (en) * 2020-08-05 2024-04-30 Liaoning Qingyang Explosive Materials Co., Ltd Detonator base
DE102020004934A1 (de) * 2020-08-13 2022-02-17 Auto-Kabel Management Gmbh Dichtung für ein elektrisches Kabel

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811351A1 (de) * 1978-03-16 1979-09-27 Dynamit Nobel Ag Verfahren zum herstellen einer zuendpille fuer elektrische brueckenzuender
CH643056A5 (de) * 1978-08-10 1984-05-15 Inventa Ag Elektrische zuendvorrichtung.
JP3037492B2 (ja) * 1991-12-24 2000-04-24 内橋エステック株式会社 電気式点火具用点火部品
JP2967576B2 (ja) * 1992-02-17 1999-10-25 日油技研工業株式会社 スクイブとその製造方法
US5596163A (en) * 1993-08-25 1997-01-21 Ems-Patvag Ag Gas generator igniting capsule
CH688564A5 (de) * 1993-08-25 1997-11-14 Ems Patvag Ag Gekapselter elektrischer Zuender mit integriertem Ueberspannungsableiter fuer einen Gasgenerator.
DE19639133A1 (de) * 1996-07-31 1998-02-05 Dynamit Nobel Ag Elektrische Anzündeinrichtung mit einer elastischen Schicht zwischen dem Aufnahmeteil und dem Kunststoffkörper
US6578487B2 (en) * 2000-12-08 2003-06-17 Special Devices, Inc. Pyrotechnic initiator with a narrowed sleeve retaining a pyrotechnic charge and methods of making same
US6874422B2 (en) * 2002-10-21 2005-04-05 Schott Glas Hermetically sealed electrical feed-through device with an oval-cross-sectioned isolated pin in a circular glass seal
FR2868833B1 (fr) * 2004-04-07 2006-06-16 Ncs Pyrotechnie & Tech Initiateur electro-pyrotechnique a fil et son procede de fabrication
JP4622605B2 (ja) * 2005-03-18 2011-02-02 タカタ株式会社 点火器組立体、インフレータ、エアバッグ装置及びシートベルト装置
DE102006056077A1 (de) * 2006-11-28 2008-05-29 Schott Ag Zündvorrichtung für eine pyrotechnische Schutzvorrichtung
FR2947622B1 (fr) * 2009-07-03 2011-08-05 Ncs Pyrotechnie & Tech Initiateur electro-pyrotechnique et son procede de fabrication
DE102011107852A1 (de) * 2011-07-01 2013-01-03 Trw Airbag Systems Gmbh Verfahren zur Herstellung eines Anzünders mit einem Widerstandsdraht und Gasgenerator mit solchem Anzünder
DE102012010608A1 (de) * 2012-05-16 2013-11-21 Trw Airbag Systems Gmbh Anzünder und Verfahren zur Herstellung eines Anzünders für einen Gasgenerator
DE102013017383A1 (de) * 2013-10-21 2015-04-23 Trw Airbag Systems Gmbh Anzündeinheit, insbesondere für einen Gasgenerator, Gasgenerator, Gassackmodul, Fahrzeugsicherheitssystem und Verfahren zur Herstellung einer Anzündeinheit
DE102017130969A1 (de) * 2017-12-21 2019-06-27 Trw Airbag Systems Gmbh Anzündeinheit, Gasgenerator, Gassackmodul, Fahrzeugsicherheitssystem und Verfahren zum Herstellen einer Anzündeinheit

Also Published As

Publication number Publication date
US20220299298A1 (en) 2022-09-22
CN114341589A (zh) 2022-04-12
WO2021043455A1 (de) 2021-03-11
KR20220040502A (ko) 2022-03-30
DE102019123755A1 (de) 2021-03-11
US11480415B2 (en) 2022-10-25
EP3997412A1 (de) 2022-05-18
ES2975110T3 (es) 2024-07-03
KR102423717B1 (ko) 2022-07-21
CN114341589B (zh) 2023-09-22
MX2022002246A (es) 2022-03-22

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