WO2005005207A1 - Airbag module for motor vehicles - Google Patents

Airbag module for motor vehicles Download PDF

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Publication number
WO2005005207A1
WO2005005207A1 PCT/EP2004/007575 EP2004007575W WO2005005207A1 WO 2005005207 A1 WO2005005207 A1 WO 2005005207A1 EP 2004007575 W EP2004007575 W EP 2004007575W WO 2005005207 A1 WO2005005207 A1 WO 2005005207A1
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WO
WIPO (PCT)
Prior art keywords
cover
airbag module
container
screw thread
module according
Prior art date
Application number
PCT/EP2004/007575
Other languages
German (de)
French (fr)
Inventor
Bernhard Mader
Robert Pillgruber
Andreas Freimüller
Original Assignee
Autoliv Development Ab
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 Autoliv Development Ab filed Critical Autoliv Development Ab
Publication of WO2005005207A1 publication Critical patent/WO2005005207A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B60R21/2035—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit

Definitions

  • the invention relates to an airbag module for motor vehicles according to the preamble of claim 1.
  • Airbag devices have been part of the standard equipment on motor vehicles for some time and are built in modules in series and in large quantities.
  • Such airbag modules essentially consist of a cup-shaped container which is open on one side and which can be closed by means of a cover.
  • a folded gas bag with an assigned gas generator is arranged in this container, the latter being used to inflate the gas bag in the case of retention.
  • the cover is designed in such a way that the gas bag is opened or pivoted to the side during the unfolding of the gas bag and thus releases the unfolding gas bag.
  • the container and the cover are first manufactured separately from each other, then the container is fitted with the gas generator and the gas bag and finally the opening of the container is closed by the cover.
  • connection between the container and the cover is realized by mechanical connecting means such as rivets, screws, clipping or locking elements or by gluing.
  • mechanical connecting means such as rivets, screws, clipping or locking elements or by gluing.
  • these connecting means are considered to be material, time and cost intensive in terms of series production.
  • an airbag arrangement which is designed in such a way that the container and cover are each cup-shaped with adjoining walls and are connected to one another by means of a snap connection, the wall of the cover being inside on the wall of the container abuts and the wall of the cover has locking projections which engage in assigned openings in the wall of the container.
  • the object of this invention is therefore to provide an airbag module for motor vehicles, which is composed in particular of a container for receiving a folded gas bag with an associated gas generator and a cover, which to improve the prior art, simple and inexpensive manufacture and assembly of the individual components, especially under the aspect of series production.
  • the object is achieved in connection with the features in the preamble of claim 1 in that the cover of the container can be connected to the container in a non-positive and / or positive manner by means of at least one screw thread.
  • the screw thread is formed by an external thread which is arranged on a cylindrical web of the cover and which engages on the inner contour of a cylindrical section of the container.
  • the screw thread is formed by an internal thread which is arranged on a cylindrical section of the inner contour of the container and which engages on the outer contour of a cylindrical web of the cover.
  • Another form would be an internal thread in the cover and an external thread in the container.
  • the screw thread can be formed according to a further embodiment by an external thread arranged on a cylindrical web of the cover, which engages in a corresponding internal thread of a cylindrical section of the inner contour of the container.
  • the cover and / or the container are assigned one or more means for preventing a relative movement between them after the final assembly.
  • the said means for preventing a relative movement between the cover and the container can be formed by a latching, clipping or the like.
  • the screw thread may be designed as a self-tapping thread.
  • the cover and the container are made of plastic by an injection molding process, the screw threads being formed directly during the manufacture of the component in question or subsequently cut or molded into the component in question.
  • the airbag module can be a driver airbag module or any other airbag module.
  • the proposed airbag module has the essential advantage that the cover can be connected to the container in a simple manner and without complex alignment measures, wherein
  • Rivets, screws and the like can be dispensed with. Finally, there is an extremely small installation space for the connection of the components to one another, since primarily screw threads are used.
  • FIG. 1 shows the airbag module according to the invention during assembly in a schematic sectional view (section II according to FIG. 3)
  • FIG. 2 shows a side view of the cover of the airbag module according to FIG. 1
  • FIG. 3 shows a view “A”
  • the airbag module consists of a container 2 which is open on one side and can be closed with a cover 1 and in which a known gas bag 3 with an associated gas generator 4 is arranged 1 and the container 2 are preferably made of plastic and according to an injection molding process which is known per se and accordingly cannot be explained in more detail
  • Receiving area for the cover 1 is cylindrical, the cover 1 having a cylindrical web 5, which in turn penetrates into the cylindrical section 6 of the container 2 during the installation of the cover 1 on the container 2. Furthermore, the cover 1 is designed in such a way that when the gas bag 3 is unfolded it is opened or pivoted to the side and thus releases the unfolding gas bag 3. In order to ensure this, the cover 1 has, on the one hand, a perforation 7 in the connection area to the cylindrical web 5, which in turn is interrupted by two opposite hinge elements 8.
  • This crowd Kidney elements 8 are formed in a preferred embodiment as known film hinges, with corresponding material areas of the web 5 being thinned out.
  • the cover 1 in the area of a so-called tear line 9 is preferably also thinned out, so that when the airbag is activated or the airbag 3 is inflated, the cover 1 is divided into two almost equally large partial areas 10a, 10b and said partial areas 10a, 10b to release the gas bag 3 about the hinge elements 8 to the side (Fig. 2 and 3).
  • the cover 1 can be connected to the container 2 by means of at least one screw thread 11 in a force-locking and / or positive manner by inserting the cover 1 into the cylindrical section 6 of the container 2 is preferably screwed.
  • the screw thread 11 is formed by an external thread arranged on the cylindrical web 5 of the cover 1, which thread engages on the inner contour of the cylindrical section 6 of the container 2.
  • the outer contour of the container does not necessarily have to be cylindrical, but can also have a different geometric shape.
  • the screw thread 11 can be directly during the
  • Production of the cover 1 can be formed in the injection molding tool or subsequently in the cylindrical web 5 the cover 1 can be cut or molded in a manner known per se.
  • the screw thread 11 primarily achieves a positive connection, that is to say a press connection between the cover 1 and the container 2.
  • the locking can be formed by an elastic locking projection on the cover 1, which in turn locks into a prepared opening within the cylindrical section 6 of the container 2 (not shown in more detail).
  • the screw thread 11 mentioned as a known self-tapping thread whereby it may be necessary to choose a higher material strength for this specially designed screw thread 11 of the cover 1 than for container 2.
  • This measure advantageously realizes both a non-positive and a positive connection between the two components to be connected.
  • This exemplary embodiment is based on the fact that the screw thread 11 is arranged on the cover 1.
  • the screw thread 11 can be arranged with the same effect on the inner contour of the cylindrical section 6 of the container 2, which then engages on the outer contour of the cylindrical web 5 of the cover 1 (not shown in more detail).
  • both the cylindrical web 5 of the cover 1 and the cylindrical section 6 of the container 2 are provided with mutually corresponding and intermeshing screw threads 11.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

The invention relates to an airbag module for motor vehicles which substantially comprises a container (2) receiving a folded gasbag (3) with an associated gas generator (4), and a cover (1). The aim of the invention is to provide an airbag module of the aforementioned type which is simple and inexpensive to produce and install while being suitable for series production. For this purpose, the cover (1) is linked with the container (2) in a non-positive and/or positive fit by means of at least one screw thread (11).

Description

Airbag-Modul für Kraftfahrzeuge Airbag module for motor vehicles
Die Erfindung betrifft ein Airbag-Modul für Kraftfahrzeuge gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an airbag module for motor vehicles according to the preamble of claim 1.
Airbagvorrichtungen gehören seit geraumer Zeit zur Standardausrüstung an Kraftfahrzeugen und werden modulartig aufgebaut serienmäßig in großen Stückzahlen hergestellt.Airbag devices have been part of the standard equipment on motor vehicles for some time and are built in modules in series and in large quantities.
Derartige Airbag-Module bestehen im wesentlichen aus einem topfförmigen und einseitig offenen Container, der mittels einer Abdeckung verschließbar ist. In diesem Container ist ein gefalteter Gassack mit zugeordnetem Gasgene- rator angeordnet, wobei letzterer zum Aufblasen des Gassak- kes im Rückhaltefall dient.Such airbag modules essentially consist of a cup-shaped container which is open on one side and which can be closed by means of a cover. A folded gas bag with an assigned gas generator is arranged in this container, the latter being used to inflate the gas bag in the case of retention.
Die Abdeckung ist bekanntermaßen derart ausgebildet, dass während des Entfaltens des Gassackes dieselbe aufge- sprengt beziehungsweise zur Seite geschwenkt wird, und somit den sich entfaltenden Gassack freigibt.As is known, the cover is designed in such a way that the gas bag is opened or pivoted to the side during the unfolding of the gas bag and thus releases the unfolding gas bag.
Der Container und die Abdeckung werden zunächst getrennt voneinander hergestellt, im Anschluss daran der Con- tainer mit dem Gasgenerator und dem Gassack bestückt und schlussendlich die Öffnung des Containers durch die Abdek- kung verschlossen.The container and the cover are first manufactured separately from each other, then the container is fitted with the gas generator and the gas bag and finally the opening of the container is closed by the cover.
In der Praxis wird die Verbindung zwischen dem Contai- ner und der Abdeckung durch mechanische Nerbindungsmittel wie Nieten, Schrauben, Verclipsungs- oder Verrastungsele- mente oder durch Verklebung realisiert. Diese Verbindungsmittel werden im Hinblick auf die Herstellung und Durchführung solcher Verbindungen unter dem Aspekt der Serienfertigung als material-, zeit- und kostenintensiv eingeschätzt.In practice, the connection between the container and the cover is realized by mechanical connecting means such as rivets, screws, clipping or locking elements or by gluing. With regard to the production and implementation of such connections, these connecting means are considered to be material, time and cost intensive in terms of series production.
So ist beispielsweise aus der DE 196 14 276 Cl eine Airbag-Anordnung bekannt geworden, die derart gestaltet ist, dass Container und Abdeckung jeweils topfförmig mit aneinanderliegenden Wandungen ausgebildet und mittels einer Rast erbindung aneinander festgelegt sind, wobei die Wandung der Abdeckung innenseitig an der Wandung des Containers anliegt und die Wandung der Abdeckung RastvorSprünge aufweist, die in zugeordnete Öffnungen der Wandung des Containers eingreifen.For example, from DE 196 14 276 Cl an airbag arrangement has become known which is designed in such a way that the container and cover are each cup-shaped with adjoining walls and are connected to one another by means of a snap connection, the wall of the cover being inside on the wall of the container abuts and the wall of the cover has locking projections which engage in assigned openings in the wall of the container.
Aufgrund der genannten, in die korrespondierenden Öffnungen eingreifenden Rastvorsprünge, ist eine sehr sorgfältige Fertigung sowie Montage der einzelnen Bauteile zu gewährleisten. Des weiteren sind Montagehilfsmittel in Form von Montagelanzen erforderlich, die durch entsprechendeBecause of the locking projections which engage in the corresponding openings, very careful manufacture and assembly of the individual components must be ensured. Furthermore, assembly aids in the form of assembly lances are required, which are replaced by appropriate
Ausnehmungen in den Container hineinreichen, um den Gassack während der Montage vor Beschädigungen durch gegebenenfalls scharfkantige Rastvorsprünge der Abdeckung zu schützen. Die Aufgabe dieser Erfindung ist es daher, ein Airbag- Modul für Kraftfahrzeuge zu schaffen, welches sich insbesondere aus einem Container zur Aufnahme eines gefalteten Gassacks mit zugeordnetem Gasgenerator und einer Abdeckung zusammensetzt, das zur Verbesserung des Standes der Technik eine einfache und kostengünstige Fertigung und Montage der Einzelbauteile insbesondere unter dem Aspekt der Serienfertigung ermöglicht. Erfindungsgemäß wird die Aufgabe in Verbindung mit den Merkmalen im Oberbegriff des Anspruchs 1 dadurch gelöst, dass die Abdeckung des Containers mittels wenigstens eines Schraubgewindes mit dem Container kraft- und/oder form- schlüssig verbindbar ist.Extend recesses in the container in order to protect the gas bag from damage by possibly sharp-edged locking projections of the cover during assembly. The object of this invention is therefore to provide an airbag module for motor vehicles, which is composed in particular of a container for receiving a folded gas bag with an associated gas generator and a cover, which to improve the prior art, simple and inexpensive manufacture and assembly of the individual components, especially under the aspect of series production. According to the invention, the object is achieved in connection with the features in the preamble of claim 1 in that the cover of the container can be connected to the container in a non-positive and / or positive manner by means of at least one screw thread.
Gemäß einer ersten bevorzugten Ausführungsform ist das Schraubgewinde durch ein an einem zylindrischen Steg der Abdeckung angeordnetes Außengewinde gebildet, welches an der Innenkontur eines zylindrischen Abschnittes des Containers angreift.According to a first preferred embodiment, the screw thread is formed by an external thread which is arranged on a cylindrical web of the cover and which engages on the inner contour of a cylindrical section of the container.
Gemäß einer zweiten bevorzugten Ausführungsform ist vorgesehen, dass das Schraubgewinde durch ein an einem zy- lindrischen Abschnitt der Innenkontur des Containers angeordnetes Innengewinde gebildet ist, welches an der Außenkontur eines zylindrischen Stegs der Abdeckung angreift. Eine weitere Ausführung form wäre ein Innengewinde in der Abdeckung und ein Außengewinde in dem Container.According to a second preferred embodiment, it is provided that the screw thread is formed by an internal thread which is arranged on a cylindrical section of the inner contour of the container and which engages on the outer contour of a cylindrical web of the cover. Another form would be an internal thread in the cover and an external thread in the container.
Wie die Erfindung weiter vorsieht, kann das Schraubgewinde gemäß einer weiteren Ausführungsform durch ein an einem zylindrischen Steg der Abdeckung angeordnetes Außengewinde gebildet sein, welches in ein korrespondierendes Innengewinde eines zylindrischen Abschnittes der Innenkontur des Containers eingreift.As the invention further provides, the screw thread can be formed according to a further embodiment by an external thread arranged on a cylindrical web of the cover, which engages in a corresponding internal thread of a cylindrical section of the inner contour of the container.
Weiterhin wird im Sinne der Erfindung vorgeschlagen, dass der Abdeckung und/oder dem Container ein oder mehrere Mittel zur Verhinderung einer Relativbewegung zwischen denselben nach der Endmontage zugeordnet sind. Die genannten Mittel zur Verhinderung einer Relativbewegung zwischen der Abdeckung und dem Containers können dabei durch eine Verrastung, Verclipsung oder ähnliches gebildet sein.Furthermore, it is proposed in the sense of the invention that the cover and / or the container are assigned one or more means for preventing a relative movement between them after the final assembly. The said means for preventing a relative movement between the cover and the container can be formed by a latching, clipping or the like.
Des weiteren kann es angezeigt sein, das Schraubgewinde als selbstschneidendes Gewinde auszubilden.Furthermore, it may be appropriate to design the screw thread as a self-tapping thread.
Wie die Erfindung außerdem vorsieht, sind die Abdek- kung und der Container aus Kunststoff nach einem Spritzgussverfahren gefertigt, wobei die Schraubgewinde direkt während der Herstellung des betreffenden Bauteils ausgebildet oder nachträglich in das betreffende Bauteil eingeschnitten oder eingeformt werden.As the invention also provides, the cover and the container are made of plastic by an injection molding process, the screw threads being formed directly during the manufacture of the component in question or subsequently cut or molded into the component in question.
Das Airbag-Modul kann hierbei ein Fahrerairbag-Modul oder jedes andere Airbag-Modul sein.The airbag module can be a driver airbag module or any other airbag module.
Das vorgeschlagene Airbag-Modul hat im Hinblick auf herkömmliche Airbag-Module den wesentlichen Vorteil, dass die Abdeckung mit einfachen Handgriffen und ohne aufwendige Ausrichtmaßnahmen mit dem Container verbindbar ist, wobeiWith regard to conventional airbag modules, the proposed airbag module has the essential advantage that the cover can be connected to the container in a simple manner and without complex alignment measures, wherein
Beschädigungen während der Montage am Gassack weitestgehend ausgeschlossen werden können. Darüber hinaus kann vorteil- aft auf zusätzliche mechanische Verbindungselemente wieDamage during assembly on the gas bag can be largely excluded. In addition, additional mechanical connecting elements such as
Nieten, Schrauben und ähnliches verzichtet werden. Schließlich ist für die Verbindung der Bauteile untereinander ein äußerst geringer Bauraum zu verzeichnen, da vornehmlich Schraubgewinde Verwendung finden.Rivets, screws and the like can be dispensed with. Finally, there is an extremely small installation space for the connection of the components to one another, since primarily screw threads are used.
Die Erfindung wird nachstehend anhand eines in denThe invention is illustrated below in the
Zeichnungen schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigen: Fig. 1 das erfindungsgemäße Airbag-Modul während des Zusammenbaus in einer schematischen Schnittansicht (Schnitt I-I nach Fig. 3) , Fig. 2 eine Seitenansicht auf die Abdeckung des Airbag-Moduls nach Fig. 1, Fig. 3 eine Ansicht „A" nach Fig. 2 auf die Abdeckung. Gem. Fig. 1 besteht das Airbag-Modul aus einem einseitig offenen und mit einer Abdeckung 1 verschließbaren Container 2 , in welchem ein an sich bekannter gefalteter Gas- sack 3 mit zugeordnetem Gasgenerator 4 angeordnet ist. Die Abdeckung 1 und der Container 2 sind vorzugsweise aus Kunststoff und nach einem an sich bekannten und demge- mäss nicht näher zu erläuternden Spritzgussverfahren hergestellt . Vorliegend ist der Container 2 topfförmig, also imDrawings illustrated schematically illustrated embodiment. Show it: 1 shows the airbag module according to the invention during assembly in a schematic sectional view (section II according to FIG. 3), FIG. 2 shows a side view of the cover of the airbag module according to FIG. 1, FIG. 3 shows a view “A” 1, the airbag module consists of a container 2 which is open on one side and can be closed with a cover 1 and in which a known gas bag 3 with an associated gas generator 4 is arranged 1 and the container 2 are preferably made of plastic and according to an injection molding process which is known per se and accordingly cannot be explained in more detail
Aufnahmebereich für die Abdeckung 1 zylindrisch ausgebildet, wobei die Abdeckung 1 einen zylindrischen Steg 5 aufweist, der seinerseits während der Montage der Abdeckung 1 an den Container 2 in den zylindrischen Abschnitt 6 des Containers 2 eindringt. Des weiteren ist die Abdeckung 1 derart ausgebildet, dass beim Entfalten des Gassacks 3 dieselbe aufgesprengt beziehungsweise zur Seite geschwenkt wird und somit den sich entfaltenden Gassack 3 freigibt. Um dieses zu gewährleisten, weist die Abdeckung 1 zum einen im Anschlussbereich an den zylindrischen Steg 5 eine Perforation 7 auf, die ihrerseits durch zwei gegenüberliegende Scharnierelemente 8 unterbrochen ist. Diese Schar- nierelemente 8 sind in einer bevorzugten Ausführungsform als an sich bekannte Filmscharniere ausgebildet, wobei entsprechende Materialbereiche des Steges 5 ausgedünnt ausgebildet sind. Zudem ist die Abdeckung 1 im Bereich einer sogenannten Aufreißlinie 9 vorzugsweise ebenfalls ausgedünnt, so dass im Falle der Aktivierung des Airbags beziehungsweise des Aufblasens des Gassackes 3 die Abdeckung 1 in zwei nahezu gleich große Teilbereiche 10a, 10b zerteilt wird und die besagten Teilbereiche 10a, 10b zur Freigabe des Gassackes 3 um die Scharnierelemente 8 zur Seite geschwenkt werden (Fig. 2 und 3) .Receiving area for the cover 1 is cylindrical, the cover 1 having a cylindrical web 5, which in turn penetrates into the cylindrical section 6 of the container 2 during the installation of the cover 1 on the container 2. Furthermore, the cover 1 is designed in such a way that when the gas bag 3 is unfolded it is opened or pivoted to the side and thus releases the unfolding gas bag 3. In order to ensure this, the cover 1 has, on the one hand, a perforation 7 in the connection area to the cylindrical web 5, which in turn is interrupted by two opposite hinge elements 8. This crowd Kidney elements 8 are formed in a preferred embodiment as known film hinges, with corresponding material areas of the web 5 being thinned out. In addition, the cover 1 in the area of a so-called tear line 9 is preferably also thinned out, so that when the airbag is activated or the airbag 3 is inflated, the cover 1 is divided into two almost equally large partial areas 10a, 10b and said partial areas 10a, 10b to release the gas bag 3 about the hinge elements 8 to the side (Fig. 2 and 3).
Um nunmehr eine einfache und kostengünstige feste Verbindung der Abdeckung 1 mit dem Container 2 zu gewährlei- sten, ist die Abdeckung 1 erfindungsgemäß mittels wenigstens eines Schraubgewindes 11 mit dem Container 2 kraf - und/oder ormschlüssig verbindbar, indem die Abdeckung 1 in den zylindrischen Abschnitt 6 des Containers 2 vorzugsweise eingeschraubt wird.In order to now ensure a simple and inexpensive, firm connection of the cover 1 to the container 2, the cover 1 can be connected to the container 2 by means of at least one screw thread 11 in a force-locking and / or positive manner by inserting the cover 1 into the cylindrical section 6 of the container 2 is preferably screwed.
Wie in Fig. 1 und Fig. 2 näher dargestellt, ist nach einer ersten bevorzugten Ausführungsform das Schraubgewinde 11 durch ein am zylindrischen Steg 5 der Abdeckung 1 angeordnetes Außengewinde gebildet, welches an der Innenkontur des zylindrischen Abschnittes 6 des Containers 2 angreift. Die Außenkontur des Containers muss dabei nicht zwangsläufig zylindrisch ausgebildet sein, sondern kann auch eine andere geometrische Form aufweisen. Das Schraubgewinde 11 kann dabei direkt während derAs shown in FIGS. 1 and 2 in more detail, according to a first preferred embodiment, the screw thread 11 is formed by an external thread arranged on the cylindrical web 5 of the cover 1, which thread engages on the inner contour of the cylindrical section 6 of the container 2. The outer contour of the container does not necessarily have to be cylindrical, but can also have a different geometric shape. The screw thread 11 can be directly during the
Herstellung der Abdeckung 1 im Spritzgusswerkzeug ausgebildet werden oder nachträglich in den zylindrischen Steg 5 der Abdeckung 1 in an sich bekannter Weise eingeschnitten oder eingeformt werden.Production of the cover 1 can be formed in the injection molding tool or subsequently in the cylindrical web 5 the cover 1 can be cut or molded in a manner known per se.
Vorliegend wird mittels des Schraubgewindes 11 vor- nehmlich eine kraftschlüssige Verbindung, dass heißt eine Pressverbindung zwischen der Abdeckung 1 und dem Container 2 erzielt.In the present case, the screw thread 11 primarily achieves a positive connection, that is to say a press connection between the cover 1 and the container 2.
Um nach der Endmontage eine Relativbewegung zwischen der Abdeckung 1 und dem Container 2 wirkungsvoll zu unterbinden, kann es sinnvoll sein, ein oder mehrere Mittel zur Verhinderung einer solchen Relativbewegung beziehungsweise zur Verhinderung des Lösens der Abdeckung 1 vom Container 2 vorzusehen. Hierfür bieten sich an sich bekannte Verrastun- gen, Verclipsungen oder ähnliches an, die ihrerseits nachIn order to effectively prevent a relative movement between the cover 1 and the container 2 after the final assembly, it can be expedient to provide one or more means for preventing such a relative movement or for preventing the cover 1 from detaching from the container 2. Known catches, clipping or the like, which are known in themselves, can be used for this purpose
Erreichen einer Montageendstellung der Abdeckung 1 zum Container 2 zur Wirkung gelangen. Beispielsweise kann die Ver- rastung durch einen elastisch ausgebildeten Rastvorsprung an der Abdeckung 1 gebildet sein, der seinerseits in eine vorbereitete Öffnung innerhalb des zylindrischen Abschnittes 6 des Containers 2 einrastet (nicht näher dargestellt) .Reaching an assembly end position of the cover 1 for the container 2 is effective. For example, the locking can be formed by an elastic locking projection on the cover 1, which in turn locks into a prepared opening within the cylindrical section 6 of the container 2 (not shown in more detail).
Ferner ist es denkbar und wird durch die Erfindung mit erfasst, das genannte Schraubgewinde 11 als an sich bekann- tes selbstschneidendes Gewinde auszubilden, wobei es gegebenenfalls erforderlich sein kann, für dieses besonders ausgebildete Schraubgewinde 11 der Abdeckung 1 eine höhere Materialfestigkeit zu wählen, als für den Container 2. Durch diese Maßnahme ist vorteilhaft sowohl eine kraft- schlüssige als auch eine formschlüssige Verbindung zwischen den beiden zu verbindenden Bauteilen realisiert. Dieses Ausführungsbeispiel stellt dabei darauf ab, dass das Schraubgewinde 11 an der Abdeckung 1 angeordnet ist . Für den Fachmann leicht nachvollziehbar kann jedoch das Schraubgewinde 11 gemäß einer zweiten bevorzugten Aus- führungsform in Form eines Innengewindes gleichwirkend an der Innenkontur des zylindrischen Abschnitts 6 des Containers 2 angeordnet sein, welches dann an der Außenkontur des zylindrischen Steges 5 der Abdeckung 1 angreift (nicht näher dargestellt) .Furthermore, it is conceivable and is also covered by the invention to design the screw thread 11 mentioned as a known self-tapping thread, whereby it may be necessary to choose a higher material strength for this specially designed screw thread 11 of the cover 1 than for container 2. This measure advantageously realizes both a non-positive and a positive connection between the two components to be connected. This exemplary embodiment is based on the fact that the screw thread 11 is arranged on the cover 1. However, according to a second preferred embodiment in the form of an internal thread, the screw thread 11 can be arranged with the same effect on the inner contour of the cylindrical section 6 of the container 2, which then engages on the outer contour of the cylindrical web 5 of the cover 1 (not shown in more detail).
Ebenso ist es denkbar, eine nicht näher dargestellte herkömmliche Schraubverbindung auszubilden, indem sowohl der zylindrische Steg 5 der Abdeckung 1 als auch der zylindrische Abschnitt 6 des Containers 2 mit zueinander korrespondierenden und ineinandergreifenden Schraubgewinden 11 versehen sind. It is also conceivable to form a conventional screw connection, not shown in more detail, in that both the cylindrical web 5 of the cover 1 and the cylindrical section 6 of the container 2 are provided with mutually corresponding and intermeshing screw threads 11.
Bezugszeichenreference numeral
1 Abdeckung 2 Container1 cover 2 containers
3 Gassack3 gas bag
4 Gasgenerator4 gas generator
5 Steg5 bridge
6 zylindrischer Abschnitt des Containers 2 7 Perforation6 cylindrical section of the container 2 7 perforation
8 Scharnierelemente8 hinge elements
9 Aufreißlinie9 tear line
10a Teilbereich der Abdeckung 1 0b Teilbereich der Abdeckung 1 1 Schraubgewinde 10a section of cover 1 0b section of cover 1 1 screw thread

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Airbag-Modul für Kraftfahrzeuge, bestehend aus einem einseitig offenen, jedoch mit einer Abdeckung (1) verschließbaren Container (2) , in welchem ein gefalteter Gassack (3) mit zugeordnetem Gasgenerator (4) angeordnet ist, dadurch g e k e n n z e i c h n e t, dass die Abdeckung (1) mittels wenigstens eines Schraubgewindes (11) mit dem Container (2) kraft- und/oder formschlüssig verbindbar ist.1. Airbag module for motor vehicles, consisting of a container (2) which is open on one side but can be closed with a cover (1), in which a folded gas bag (3) with an associated gas generator (4) is arranged, characterized in that the cover (1) by means of at least one screw thread (11) can be connected to the container (2) in a non-positive and / or positive manner.
2. Airbag-Modul nach Anspruch 1, dadurch gekenn- zeichnet, dass das Schraubgewinde (11) durch ein an einem zylindrischen Steg (5) der Abdeckung (1) angeordnetes Außengewinde gebildet ist, welches an der Innenkontur eines zylindrischen Abschnittes (6) des Containers (2) angreift. 2. Airbag module according to claim 1, characterized in that the screw thread (11) is formed by an external thread arranged on a cylindrical web (5) of the cover (1), which on the inner contour of a cylindrical section (6) of the Containers (2) attacks.
3. Airbag-Modul nach Anspruch 1, dadurch gekennzeichnet, dass das Schraubgewinde (11) durch ein an einem zylindrischen Abschnitt (6) der Innenkontur des Containers (2) angeordnetes Innengewinde gebildet ist, welches an der Außenkontur eines zylindrischen Steges (5) der Abdeckung (1) angreift.3. Airbag module according to claim 1, characterized in that the screw thread (11) is formed by an internal thread arranged on a cylindrical section (6) of the inner contour of the container (2), which on the outer contour of a cylindrical web (5) Cover (1) attacks.
4. Airbag-Modul nach Anspruch 1, dadurch gekennzeichnet, dass das Schraubgewinde (11) durch ein an einem zylindrischen Steg (5) der Abdeckung (1) angeordnetes Au- ßengewinde gebildet ist, welches in ein korrespondierendes Innengewinde eines zylindrischen Abschnittes (6) der Innen- kontur des Containers (2) eingreift. 4. Airbag module according to claim 1, characterized in that the screw thread (11) is formed by an external thread which is arranged on a cylindrical web (5) of the cover (1) and which fits into a corresponding internal thread of a cylindrical section (6). the inner contour of the container (2) engages.
5. Airbag-Modul nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Abdeckung (1) und/oder dem Container (2) ein oder mehrere Mittel zur Verhinderung einer Relativbewegung zwischen denselben nach der Endmontage zugeordnet sind.5. Airbag module according to one of claims 1 to 4, characterized in that the cover (1) and / or the container (2) are assigned one or more means for preventing a relative movement between them after final assembly.
6. Airbag-Modul nach Anspruch 5, dadurch gekennzeichnet, dass an diesem zur Verhinderung einer Relativbewegung zwischen der Abdeckung (1) und dem Container (2) Verrastungs- oder Verclipsungsmittel angeordnet sind.6. Airbag module according to claim 5, characterized in that on this to prevent a relative movement between the cover (1) and the container (2) locking or clipping means are arranged.
7. Airbag-Modul nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass das Schraubgewinde (11) als selbstschneidendes Gewinde ausgebildet ist.7. Airbag module according to one of claims 2 and 3, characterized in that the screw thread (11) is designed as a self-tapping thread.
8. Airbag-Modul nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Abdeckung (1) und der Container (2) aus Kunststoff nach einem Spritzgussverfahren gefertigt sind, wobei die Schraubgewinde (11) direkt wäh- rend der Herstellung des betreffenden Bauteils ausgebildet oder nachträglich in das betreffende Bauteil eingeschnitten oder eingeformt sind.8. Airbag module according to one of claims 1 to 7, characterized in that the cover (1) and the container (2) are made of plastic by an injection molding process, the screw thread (11) directly during the manufacture of the relevant Component formed or subsequently cut or molded into the relevant component.
9. Airbag-Modul nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Airbag-Modul ein Fah- rerairbag-Modul oder jedes andere Airbag-Modul ist. 9. Airbag module according to one of claims 1 to 8, characterized in that the airbag module is a driver's airbag module or any other airbag module.
PCT/EP2004/007575 2003-07-12 2004-07-09 Airbag module for motor vehicles WO2005005207A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10331655.8 2003-07-12
DE2003131655 DE10331655A1 (en) 2003-07-12 2003-07-12 Airbag module for motor vehicles

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WO (1) WO2005005207A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006029424B4 (en) * 2006-06-27 2009-04-09 Lisa Dräxlmaier GmbH airbag cover
DE102012014089B4 (en) * 2012-07-16 2016-08-11 Autoliv Development Ab Airbag module, in particular driver's airbag module
DE102013021083B3 (en) * 2013-12-18 2015-05-21 Autoliv Development Ab Airbag unit and method for mounting an airbag unit

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5388858A (en) * 1991-02-25 1995-02-14 Trw, Inc. Air bag module structure and method of assembly
DE19614276C1 (en) * 1996-04-11 1997-08-28 Autoliv Dev Air bag for vehicle
EP1236622A2 (en) * 2001-02-23 2002-09-04 Breed Automotive Technology, Inc. Driver side air bag module with annular air bag

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19940702A1 (en) * 1999-08-27 2001-03-01 Bayerische Motoren Werke Ag Airbag steering wheel
DE20215115U1 (en) * 2002-10-01 2003-02-20 Trw Automotive Safety Sys Gmbh Airbag module

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388858A (en) * 1991-02-25 1995-02-14 Trw, Inc. Air bag module structure and method of assembly
DE19614276C1 (en) * 1996-04-11 1997-08-28 Autoliv Dev Air bag for vehicle
EP1236622A2 (en) * 2001-02-23 2002-09-04 Breed Automotive Technology, Inc. Driver side air bag module with annular air bag

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