EP1452824A1 - Heating element for initiating pyrotechnic charges - Google Patents

Heating element for initiating pyrotechnic charges Download PDF

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Publication number
EP1452824A1
EP1452824A1 EP04100152A EP04100152A EP1452824A1 EP 1452824 A1 EP1452824 A1 EP 1452824A1 EP 04100152 A EP04100152 A EP 04100152A EP 04100152 A EP04100152 A EP 04100152A EP 1452824 A1 EP1452824 A1 EP 1452824A1
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EP
European Patent Office
Prior art keywords
contact surfaces
heating element
resistance
resistance track
connecting elements
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.)
Withdrawn
Application number
EP04100152A
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German (de)
French (fr)
Inventor
Markus Forsthuber
Robert Hatzl
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.)
Hirtenberger Schaffler Automotive Zunder GmbH
Original Assignee
Hirtenberger Schaffler Automotive Zunder 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
Application filed by Hirtenberger Schaffler Automotive Zunder GmbH filed Critical Hirtenberger Schaffler Automotive Zunder GmbH
Publication of EP1452824A1 publication Critical patent/EP1452824A1/en
Withdrawn legal-status Critical Current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
    • F42B3/124—Bridge initiators characterised by the configuration or material of the bridge

Definitions

  • the present invention relates to a heating element for igniting Pyrotechnic charges consisting of a basic body, a Resistance path on the main body between two transverse to Resistance path extending contact surfaces is arranged, and Connecting elements arranged in part on the contact surfaces are and the compound e.g. to make contact pins.
  • the connecting elements connect the contact surfaces e.g. With Contact pins, which are located directly next to the contact surfaces are located. All produced in layer technology heating elements for Ignition of pyrotechnic charges are constructed such that the Resistance path in the middle of the contact surfaces is connected to these and that also themaschine ists reconstructe and thus the connecting elements are mounted approximately in the middle of the contact surfaces. The resistance track thus extends along the line connecting the centers of Contacting pins.
  • the electrical connection between the Diesianssstatten and the Contact surfaces of the heating element can by means of solder, electrically conductive adhesive or wire bonding done, the bonding wires with a plastic compound (so-called "Glob-top”) are covered.
  • solder paste, glue or Glob-top flows over the Glüh Kunststoff. It can also bleed the glue or the flux of the solder during the soldering process, the resistance path cover.
  • connection points of Resistance path to the contact surfaces and the connecting elements along the contact surfaces are offset from each other.
  • the Resistance path is thus according to the invention no longer in the Connecting line of the centers ofmaschinetechnischsene, but the Connection points of the resistance path to the contact surfaces were as far away as possible from this connecting line.
  • the electric Connection can be made without endangering the resistance path.
  • the arrangement of the resistance track and the connecting elements to each other on the contact surfaces on the body is so designed that the contacting process (when applying the Connecting elements) damage the resistance track can be avoided.
  • the Drag track is designed meandering. This will change the length the resistance path increased even more.
  • Fig. 1 shows a heating element according to the prior art
  • Fig. 2 is a first Embodiment of a heating element according to the invention
  • Fig. 3 a second embodiment of a heating element according to the invention
  • 4 shows a third embodiment of a heating element according to the invention.
  • a heating element In a heating element according to the prior art (see Fig. 1) is on a base body 1, a resistance track 2 applied. Their ends are in contact with contact surfaces 3, wherein the connection points between the resistance track 2 and the contact surfaces 3 each approximately in the center of the contact surfaces 3 are. Outside the contact surfaces are Dies michslle 4 provided to which the ignition voltage is applied, when the pyrotechnic charge is to be ignited. So that Stress on the contact surfaces 3 and thus on the resistance path. 2 is directed, connecting elements 5 are provided, in this case just a small amount of solder, which is partly on the Contact surface and partially on the Kunststoffmaschinessensw lies. It is easy to see that in case of a slight overrun of the provided amount of solder this flows up to the resistance path 2, whereby the electrical properties (in particular the Resistance) change quite considerably, of course.

Abstract

A resistance strip (2b) is provided on a base body (1), with contact surfaces (3) at each side of the base body making electrical contact with the strip at each side. Conductive elements (5) electrically connect each contact surface with an electrical terminal at a location offset from a location at which the strip contacts the contact surfaces.

Description

Technische GebietTechnical area

Die vorliegende Erfindung betrifft ein Heizelement zum Zünden von pyrotechnischen Ladungen bestehend aus einem Grundkörper, einer Widerstandsbahn, die auf dem Grundkörper zwischen zwei quer zur Widerstandsbahn verlaufenden Kontaktflächen angeordnet ist, und Verbindungselementen, die zum Teil auf den Kontaktflächen angeordnet sind und die Verbindung z.B. zu Kontaktierungsstiften herstellen.The present invention relates to a heating element for igniting Pyrotechnic charges consisting of a basic body, a Resistance path on the main body between two transverse to Resistance path extending contact surfaces is arranged, and Connecting elements arranged in part on the contact surfaces are and the compound e.g. to make contact pins.

Stand der TechniekState of the art

Die Verbindungselemente verbinden die Kontaktflächen z.B. mit Kontaktierungsstiften, die sich unmittelbar neben den Kontaktflächen befinden. Sämtliche in Schichttechnik hergestellte Heizelemente zum Zünden von pyrotechnischen Ladungen sind derart aufgebaut, dass die Widerstandsbahn in der Mitte der Kontaktflächen mit diesen verbunden ist, und dass auch die Kontaktierungsstifte und somit die Verbindungselemente etwa in der Mitte der Kontaktflächen angebracht sind. Die Widerstandsbahn erstreckt sich somit entlang der Verbindungslinie der Mittelpunkte der Kontaktierungsstifte.The connecting elements connect the contact surfaces e.g. With Contact pins, which are located directly next to the contact surfaces are located. All produced in layer technology heating elements for Ignition of pyrotechnic charges are constructed such that the Resistance path in the middle of the contact surfaces is connected to these and that also the Kontaktierungsstifte and thus the connecting elements are mounted approximately in the middle of the contact surfaces. The resistance track thus extends along the line connecting the centers of Contacting pins.

Die elektrische Verbindung zwischen den Kontaktierungsstiften und den Kontaktflächen des Heizelements kann mittels Lötverbindung, elektrisch leitfähigem Klebstoff oder Drahtbonden erfolgen, wobei die Bonddrähte mit einer Kunststoffmasse (sog. "Glob-top") abgedeckt werden. Beim Kontaktierungsprozess kann es passieren, dass Lotpaste, Kleber oder Glob-top über die Glühbrücke fließt. Es kann auch der Kleber ausbluten oder das Flussmittel des Lotes beim Lötprozess die Widerstandsbahn abdecken.The electrical connection between the Kontaktierungsstiften and the Contact surfaces of the heating element can by means of solder, electrically conductive adhesive or wire bonding done, the bonding wires with a plastic compound (so-called "Glob-top") are covered. At the Contacting process can happen that solder paste, glue or Glob-top flows over the Glühbrücke. It can also bleed the glue or the flux of the solder during the soldering process, the resistance path cover.

Dadurch können die elektrischen Eigenschaften der Widerstandsbahn verändert werden (z.B. elektrischer Widerstand, Zündempfindlichkeit), sodass das Heizelement im schlimmsten Fall komplett versagen kann.This allows the electrical properties of the resistance track changed (e.g., electrical resistance, ignition sensitivity), so that the heating element can fail completely in the worst case.

Offenbarungepiphany Technisches ProblemTechnical problem

Es ist Aufgabe der vorliegenden Erfindung, ein Zündelement zu schaffen, dessen Zuverlässigkeit höher ist als die der oben beschriebenen Zündelemente.It is an object of the present invention to provide an ignition element, its reliability is higher than that described above Ignition elements.

Technische LĶsungTechnical solution

Diese Aufgabe wird durch ein Zündelement der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass die Anschlussstellen der Widerstandsbahn an die Kontaktflächen und die Verbindungselemente entlang der Kontaktflächen gegeneinander versetzt sind. Die Widerstandsbahn liegt also erfindungsgemäß nicht mehr in der Verbindungslinie der Mittelpunkte der Kontaktierungsstifte, sondern die Anschlussstellen der Widerstandsbahn zu den Kontaktflächen wurden möglichst weit von dieser Verbindungslinie weg gelegt. Die elektrische Verbindung kann dadurch ohne Gefährdung der Widerstandsbahn erfolgen. Die Anordnung der Widerstandsbahn und der Verbindungselemente zueinander auf den Kontaktflächen auf dem Grundkörper ist also so gestaltet, dass beim Kontaktierungsprozess (beim Aufbringen der Verbindungselemente) eine Beschädigung der Widerstandsbahn vermieden werden kann.This object is achieved by an ignition element of the type mentioned According solved according to the invention that the connection points of Resistance path to the contact surfaces and the connecting elements along the contact surfaces are offset from each other. The Resistance path is thus according to the invention no longer in the Connecting line of the centers of Kontaktierungsstifte, but the Connection points of the resistance path to the contact surfaces were as far away as possible from this connecting line. The electric Connection can be made without endangering the resistance path. The arrangement of the resistance track and the connecting elements to each other on the contact surfaces on the body is so designed that the contacting process (when applying the Connecting elements) damage the resistance track can be avoided.

Wenn man die Anschlussstellen der Widerstandsbahn an die Kontaktflächen in entgegengesetzter Richtung gegenüber den Verbindungselementen versetzt, hat man zusätzlich zu dem oben genannten Vorteil auch noch die Möglichkeit, eine längere Widerstandsbahn bei gleichbleibender Grundfläche des Grundkörpers auszuführen, weil diese nun diagonal verläuft.If you connect the junctions of the resistor track to the Contact surfaces in the opposite direction to the Connecting elements offset, one has in addition to the above mentioned advantage also the possibility of a longer Resistance path with the same base area of the basic body because it is now diagonal.

Nach einer weiteren Ausführungsform ist vorgesehen, dass die Widerstandsbahn mäanderförmig ausgeführt ist. Dadurch wird die Länge der Widerstandsbahn noch stärker erhöht.According to a further embodiment it is provided that the Drag track is designed meandering. This will change the length the resistance path increased even more.

Zeichnungenbeschreibungdrawings Description

An Hand der beiliegenden Figuren wird die vorliegende Erfindung näher erläutert. Es zeigt:With reference to the accompanying figures, the present invention will become more apparent explained. It shows:

Fig. 1 ein Heizelement gemäß dem Stand der Technik; Fig. 2 eine erste Ausführungsform eines erfindungsgemäßen Heizelements; Fig. 3 eine zweite Ausführungsform eines erfindungsgemäßen Heizelements; und Fig. 4 eine dritte Ausführungsform eines erfindungsgemäßen Heizelements.Fig. 1 shows a heating element according to the prior art; Fig. 2 is a first Embodiment of a heating element according to the invention; Fig. 3 a second embodiment of a heating element according to the invention; and 4 shows a third embodiment of a heating element according to the invention.

Best ReglerungsformBest control form

Bei einem Heizelement gemäß dem Stand der Technik (siehe Fig. 1) ist auf einem Grundkörper 1 eine Widerstandsbahn 2 aufgebracht. Deren Enden stehen mit Kontaktflächen 3 in Verbindung, wobei die Anschlussstellen zwischen der Widerstandsbahn 2 und den Kontaktflächen 3 jeweils etwa in der Mitte der Kontaktflächen 3 liegen. Außerhalb der Kontaktflächen sind Kontaktierungsstifte 4 vorgesehen, an die die Zündspannung angelegt wird, wenn die pyrotechnische Ladung gezündet werden soll. Damit die Spannung auf die Kontaktflächen 3 und somit auf die Widerstandsbahn 2 geleitet wird, sind Verbindungselemente 5 vorgesehen, in diesem Fall einfach jeweils eine kleine Menge Lötzinn, die teilweise auf der Kontaktfläche und teilweise auf dem Kontaktierungsstift liegt. Es ist leicht einzusehen, dass bei einer geringfügigen Überschreitung der vorgesehenen Menge Lötzinn dieses bis auf die Widerstandsbahn 2 fließt, wodurch sich die elektrischen Eigenschaften (insbesondere der Widerstand) natürlich ganz erheblich ändern.In a heating element according to the prior art (see Fig. 1) is on a base body 1, a resistance track 2 applied. Their ends are in contact with contact surfaces 3, wherein the connection points between the resistance track 2 and the contact surfaces 3 each approximately in the center of the contact surfaces 3 are. Outside the contact surfaces are Kontaktierungsstifte 4 provided to which the ignition voltage is applied, when the pyrotechnic charge is to be ignited. So that Stress on the contact surfaces 3 and thus on the resistance path. 2 is directed, connecting elements 5 are provided, in this case just a small amount of solder, which is partly on the Contact surface and partially on the Kontaktierungsstift lies. It is easy to see that in case of a slight overrun of the provided amount of solder this flows up to the resistance path 2, whereby the electrical properties (in particular the Resistance) change quite considerably, of course.

Aus diesem Grund ist gemäß der Erfindung (s. Fig. 2) vorgesehen, dass die Anschlussstellen der Widerstandsbahn 2 gegenüber den Kontaktierungsstiften 4 versetzt angeordnet sind. Bei einer geringfügigen Überschreitung der vorgesehenen Menge Lötzinn kann dieses nun nicht mehr bis auf die Widerstandsbahn 2 fließen, sodass die Ausschussrate dadurch erheblich verringert wird. Gemäß Fig. 2 sind die beiden Anschlussstellen in dieselbe Richtung versetzt, sodass - verglichen mit Fig. 1 - die Widerstandsbahn 2 einfach parallel verschoben ist. Gemäß Fig. 3 sind die beiden Anschlussstellen gegensinnig verschoben, sodass nun die Widerstandsbahn diagonal verläuft. Sie ist dadurch - bei gleicher Fläche des Grundkörpers 1 - länger. Noch länger ist die Widerstandsbahn gemäß Fig. 4, wo die Widerstandsbahn zusätzlich noch mäanderförmig ausgebildet ist.For this reason, it is provided according to the invention (see Fig. 2) that the Connection points of the resistance track 2 opposite the Contact pins 4 are arranged offset. At a minor Exceeding the intended amount of solder can not do this now flow more down to the resistance 2, so the scrap rate This is significantly reduced. 2, the two Connection points in the same direction offset so that - compared with Fig. 1 - the resistance track 2 is simply moved in parallel. According to Fig. 3, the two connection points are shifted in opposite directions, so now the resistance track runs diagonally. It is thereby - at the same Surface of the body 1 - longer. Even longer is the resistance track as shown in FIG. 4, where the resistance track additionally meandering is trained.

Claims (3)

Heizelement zum Zünden von pyrotechnischen Ladungen bestehend aus einem Grundkörper (1), einer Widerstandsbahn (2), die auf dem Grundkörper (1) zwischen zwei quer zur Widerstandsbahn verlaufenden Kontaktflächen (3) angeordnet ist, und Verbindungselementen (5), die zum Teil auf den Kontaktflächen (3) angeordnet sind und die Verbindung z.B. zu Kontaktierungsstiften (4) herstellen, dadurch gekennzeichnet, dass die Anschlussstellen der Widerstandsbahn (2) an die Kontaktflächen (3) und die Verbindungselemente (5) entlang der Kontaktflächen (3) gegeneinander versetzt sind.Heating element for igniting pyrotechnic charges consisting of a base body (1), a resistance track (2), which is arranged on the base body (1) between two contact surfaces (3) running transversely to the resistance track, and connecting elements (5), partially on the contact surfaces (3) are arranged and make the connection, for example to Kontaktierungsstiften (4), characterized in that the connection points of the resistance track (2) to the contact surfaces (3) and the connecting elements (5) along the contact surfaces (3) are offset from each other , Heizelement nach Anspruch 1, dadurch gekennzeichnet, dass die Anschlussstellen der Widerstandsbahn (2) an die Kontaktflächen (3) in entgegengesetzter Richtung gegenüber den Verbindungselementen (5) versetzt sind. (Fig. 3)Heating element according to claim 1, characterized in that the connection points of the resistance track (2) to the contact surfaces (3) in the opposite direction relative to the connecting elements (5) are offset. (Fig. 3) Heizelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Widerstandsbahn (2) mäanderförmig ausgeführt ist. (Fig. 4)Heating element according to claim 1 or 2, characterized in that the resistance track (2) is designed meander-shaped. (Fig. 4)
EP04100152A 2003-02-26 2004-01-19 Heating element for initiating pyrotechnic charges Withdrawn EP1452824A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2832003 2003-02-26
AT2832003 2003-02-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2932186B1 (en) * 2012-12-11 2017-10-04 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Miniature electro-pyrotechnic igniter, and ignition head for the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011107851A1 (en) * 2011-07-01 2013-01-03 Trw Airbag Systems Gmbh Method for manufacturing pyrotechnic igniter of gas generator in e.g. restraint system of vehicle, involves pressing pyrotechnic charge on igniter body and bridge wire such that pyrotechnic charge is applied on bridge wire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753403A (en) * 1968-09-19 1973-08-21 Us Navy Static discharge for electro-explosive devices
DE3918408A1 (en) * 1989-06-06 1990-12-13 Messerschmitt Boelkow Blohm Electric bridge initiator fuse with inductive meander line - has conductive track broken for insertion of two fusible bridges between symmetrical halves of induction coil
US5179248A (en) * 1991-10-08 1993-01-12 Scb Technologies, Inc. Zener diode for protection of semiconductor explosive bridge
US5847309A (en) * 1995-08-24 1998-12-08 Auburn University Radio frequency and electrostatic discharge insensitive electro-explosive devices having non-linear resistances
US6408758B1 (en) * 1999-11-05 2002-06-25 Livbag Snc Photoetched-filament pyrotechnic initiator protected against electrostatic discharges

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974424A (en) * 1974-10-07 1976-08-10 Ici United States Inc. Variable resistance bridge element
DE19704097A1 (en) * 1997-02-04 1998-08-06 Wickmann Werke Gmbh Electrical fuse element
US6772692B2 (en) * 2000-05-24 2004-08-10 Lifesparc, Inc. Electro-explosive device with laminate bridge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753403A (en) * 1968-09-19 1973-08-21 Us Navy Static discharge for electro-explosive devices
DE3918408A1 (en) * 1989-06-06 1990-12-13 Messerschmitt Boelkow Blohm Electric bridge initiator fuse with inductive meander line - has conductive track broken for insertion of two fusible bridges between symmetrical halves of induction coil
US5179248A (en) * 1991-10-08 1993-01-12 Scb Technologies, Inc. Zener diode for protection of semiconductor explosive bridge
US5847309A (en) * 1995-08-24 1998-12-08 Auburn University Radio frequency and electrostatic discharge insensitive electro-explosive devices having non-linear resistances
US6408758B1 (en) * 1999-11-05 2002-06-25 Livbag Snc Photoetched-filament pyrotechnic initiator protected against electrostatic discharges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2932186B1 (en) * 2012-12-11 2017-10-04 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Miniature electro-pyrotechnic igniter, and ignition head for the same

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