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EP1412231A1 - Safety device for a motor vehicle seat - Google Patents

Safety device for a motor vehicle seat

Info

Publication number
EP1412231A1
EP1412231A1 EP02772110A EP02772110A EP1412231A1 EP 1412231 A1 EP1412231 A1 EP 1412231A1 EP 02772110 A EP02772110 A EP 02772110A EP 02772110 A EP02772110 A EP 02772110A EP 1412231 A1 EP1412231 A1 EP 1412231A1
Authority
EP
European Patent Office
Prior art keywords
airbag
backrest
safety device
frame
motor vehicle
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Withdrawn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
EP02772110A
Other languages
German (de)
French (fr)
Inventor
Claudio Bargheer
Roland Beisswenger
Dirk Benthaus
Michael Eichler
Thomas FÖLSTER
Alexander Koblischke
Uwe Nagel
Kai-Thorsten Schmiedl
Ulrich Tschäschke
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1412231A1 publication Critical patent/EP1412231A1/en
Withdrawn legal-status Critical Current

Links

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
    • B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/58—Seat coverings
    • B60N2002/5808—Seat coverings comprising opening zones for airbags

Definitions

  • the invention relates to a safety device for a motor vehicle seat according to the preamble of patent claim 1.
  • Such safety devices are known for example from utility model DE 200 17 919 U1. They are suitable for a motor vehicle seat with a seat cushion part and a backrest, the backrest having a frame, a backrest cover pointing backwards as viewed in the direction of travel and a cushion facing forward in the direction of travel.
  • An airbag module is integrated into the backrest, which is arranged in the region of the backrest facing the motor vehicle side wall structure and deploys in the event of an impact between a driver and the motor vehicle side wall structure, for example the B-pillar and / or the side door.
  • the airbag module is arranged between the frame and the backrest cover, so that it is placed behind the backrest cover and in front of the frame when viewed from the side wall structure.
  • An airbag outlet opening is provided in the area in which the backrest cover and the upholstery meet.
  • the invention is characterized in that the airbag module, viewed from the side wall structure, is arranged behind the backrest frame - that is, behind a load-bearing part in the backrest.
  • This arrangement ensures that the airbag module is shielded against forces acting from the direction of the side wall structure.
  • an airbag outlet opening can be effectively protected from penetrating structural parts and thus it can be ensured that the opening is always free for an airbag outlet.
  • the backrest frame is preferably designed in such a way that deformation practically does not occur. In the event of a lateral force, the entire backrest with the seat cushion part is shifted towards the center of the motor vehicle rather than the frame being permanently deformed.
  • Such a backrest frame can consist, for example, of die-cast magnesium.
  • the structure is very simple because no additional measures are necessary to ensure that the airbag deploys safely.
  • existing parts of the backrest are used to accomplish this.
  • the arrangement of the airbag module in the backrest according to the invention accordingly ensures that the airbag deploys or exits considerably more reliably.
  • the airbag module has a housing which at least partially encloses the airbag, for example in the rear area and in the side areas.
  • the housing therefore has a relatively wide opening because it does not completely surround the airbag module. As a result, the housing opposes the deploying airbag with relatively little resistance, which supports reliable deployment.
  • a sheet metal can be provided in the area in which the housing does not enclose the airbag module. This sheet serves once to close the airbag housing and thus to offer some protection to the airbag components arranged in the housing in the idle state. It is also used to dampen the first thrust of the deploying airbag so that the airbag deploys at a moderate speed. Finally, the metal sheet clears the airbag. If the airbag presses against the sheet when it is unfolded, it is bent open and pushes aside the components of the backrest that connect to the sheet, such as the cushion.
  • the sheet metal is preferably arranged on the side of the frame which points away from the outer contour of the seat facing the side wall structure.
  • the sheet can be firmly connected on one side to the frame of the backrest. This firm connection forms a hinge around which the sheet metal moves when the airbag emerges. But it is also conceivable that the sheet metal is connected directly to the airbag housing and swings open from this connection.
  • the function of the sheet can also be fulfilled by other components of the backrest. If, for example, the cushion is arranged on a cushion carrier, it is conceivable that this cushion carrier, which is also between the cushion and Airbag module is arranged, which closes, dampens and opens.
  • the frame at least partially surrounds the airbag module.
  • the frame preferably encloses the airbag module in the areas in which the housing encloses the airbag.
  • the outlet or the outlet opening for the airbag can be provided, for example, between the frame and the cushion.
  • the combination of materials of rigid frame and elastic cushion, which are also coordinated in their shape, makes it possible to provide an outlet opening for an airbag in a particularly simple manner without using additional components. If the frame and the cushion are not connected to one another in the area of the outlet opening, the cushion is deformed when the airbag is deployed by the force that the airbag brings against it, thereby clearing the way for the airbag to exit.
  • the arrangement according to the invention is visually appealing because the opening cannot be seen. In addition, no seams or other known closure elements are necessary. On the one hand, this suggests a simple and therefore also inexpensive solution. On the other hand, there are no elements that possibly prevent the airbag from escaping.
  • the outlet opening can be arranged, for example, in the region of the motor vehicle seat facing the side wall structure. If the direction of deployment points obliquely forward, the airbag is particularly advantageously positioned when it is deployed and in the deployed state.
  • FIGS. 1 and 2 shows a section through a side region of a motor vehicle seat facing the side wall structure with a safety device according to the invention in the idle state according to line II-II in FIGS. 1 and
  • FIG. 3 a section corresponding to FIG. 2 with an activated safety device.
  • a backrest 1 which forms a motor vehicle seat with a seat cushion part, not shown.
  • the backrest 1 has a headrest 2.
  • a backrest cover 3 can be seen, which covers the rear part of the backrest 1.
  • a cushion 4 can be seen, which forms the forward-facing part of the backrest 1 and enables a driver to sit comfortably.
  • a backrest frame 5 can also be seen. This is visibly arranged, it forms part of the outer contour of the motor vehicle seat.
  • cover such a backrest frame in a suitable manner, for example by the backrest cover 3, which is pulled further forward in the side region of the motor vehicle seat, or by a poster 4.
  • An airbag module is arranged in the backrest.
  • The. 2 that shows a sectional illustration of the region of a backrest 1 facing the motor vehicle side according to line II-II in FIG. 1.
  • Arrow A points to the rear in the direction of travel and arrow B points to the front in the direction of travel.
  • the backrest cover 3 is shown in the rear-facing area. In addition to the rear of the backrest 1, this covers parts of the side regions of the backrest 1 pointing in the direction of the side wall structure.
  • the forward-facing side of the backrest 1 is formed by the cushion 4. This is applied to a cushion support 6.
  • the frame 5 is arranged between the backrest cover 3 and the cushion 4.
  • backrest cover 3, frame 5 and cushion 4 form the outer contour of the backrest 1. They collide at points 7 and 8, respectively.
  • the frame 5 it is also conceivable for the frame 5 to be arranged in the interior of the backrest 1 and, for example, to be covered by the backrest cover 3 and / or cushion 4. In this case, the upholstery 4 and the backrest cover 3 meet on the outer contour of the seat.
  • the frame 5 has an essentially U-shaped cross section, the opening 9 of which is directed towards the front.
  • An airbag module 11 is arranged in the space surrounded by the U-shaped frame 5.
  • the frame 5 thus extends between the airbag module 11 and the side wall structure of the motor vehicle.
  • the airbag module 11 consists of generally customary components, which are not discussed in more detail here. 2 shows an airbag housing 12, the cross-sectional shape of which is adapted to that of the frame 5.
  • An opening 13 of the airbag housing 12 points in the same direction as the opening 9 of the frame 5, namely in the direction of travel.
  • the opening 13 of the airbag housing 12 is provided with a sheet 14.
  • the plate 14 is connected to the frame 5 on the end of the frame 5 facing away from the outer contour of the backrest 1.
  • the other end of the sheet 14 is on the Airbag housing 12.
  • the sheet 14 is arranged between the airbag module 12 and the cushion 4.
  • An airbag outlet opening is provided at point 8, that is to say at the point that the backrest frame 5 and cushion support 6 meet.
  • Backrest frame 5 and cushion 6 are not connected to one another in this area. They only abut each other and form a closed contour due to their mutually adapted shapes.
  • the airbag outlet opening is therefore not visible from the outside. But there are also no additional elements or structures necessary to close ⁇ around the opening.
  • FIG. 3 An unfolding airbag 15 is shown in FIG. 3.
  • the airbag 15 has already pressed the sheet 14 outward when it is unfolded about a pivot axis 16.
  • the sheet 14 in turn has moved the cushion carrier 6 with the cushion 4 applied thereon.
  • an exit joint or opening b is formed, which clears the way for the airbag.
  • the airbag 15 initially bumping against the sheet 14, the first pulse of the deploying airbag 15 is damped.
  • the airbag 15 thus exits at a reduced speed.
  • the sheet 14 serves to clear the way for the emerging airbag 15.
  • the frame 5 fulfills two tasks with respect to the safety device according to the invention. On the one hand, it shields them from the effects of forces from the area of the side wall and thereby prevents the outlet opening from being blocked. On the other hand, it supports the airbag 15 in deploying in the right direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Seats For Vehicles (AREA)

Abstract

The aim of the invention is to provide a safety device which ensures the reliable and reproducible deployment of an airbag (15). Said safety device is suitable for a motor vehicle seat comprising a seat cushion part and a seat back (1), said seat back comprising a frame (5), a cover (3) which faces the rear in the direction of travel, and padding (4) which faces the front in the direction of travel. An airbag module (11) is integrated into the region of the seat back (1) facing the lateral wall structure of the motor vehicle in such a way that an airbag (15) unfolds in the event of an impact between a driver and the lateral wall of the motor vehicle. According to the invention, the airbag module (11) is arranged behind the frame (5) of the seat back in relation to the lateral wall of the motor vehicle.

Description

DaimlerChrysler AGDaimlerChrysler AG
Sicherheitseinrichtung für einen KraftwagensitzSafety device for a motor vehicle seat
Die Erfindung betrifft eine Sicherheitseinrichtung für einen Kraftwagensitz gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a safety device for a motor vehicle seat according to the preamble of patent claim 1.
Derartige Sicherheitseinrichtungen sind beispielsweise aus dem Gebrauchsmuster DE 200 17 919 Ul bekannt. Sie sind für einen Kraftwagensitz mit einem Sitzkissenteil und einer Rückenlehne geeignet, wobei die Rückenlehne einen Rahmen, eine in Fahrtrichtung gesehen nach hinten weisende Lehnenabdeckung sowie ein in Fahrtrichtung gesehen nach vorne weisendes Polster aufweist. In die Rückenlehne ist ein Airbagmodul integriert, welches in dem der Kraftwagenseitenwandstruktur zugewandten Bereich der Rückenlehne angeordnet ist und sich bei einem Aufprall zwischen einem Fahrer und der Kraftwagenseitewandstruktur, beispielsweise der B-Säule und/oder der Seitentür, entfaltet.Such safety devices are known for example from utility model DE 200 17 919 U1. They are suitable for a motor vehicle seat with a seat cushion part and a backrest, the backrest having a frame, a backrest cover pointing backwards as viewed in the direction of travel and a cushion facing forward in the direction of travel. An airbag module is integrated into the backrest, which is arranged in the region of the backrest facing the motor vehicle side wall structure and deploys in the event of an impact between a driver and the motor vehicle side wall structure, for example the B-pillar and / or the side door.
Bei der bekannten Sicherheitseinrichtung ist das Airbagmodul zwischen dem Rahmen und der Lehnenabdeckung angeordnet, so dass es von der Seitenwandstruktur gesehen hinter der Lehnenabdeckung und vor dem Rahmen platziert ist. Eine Airbagaus- trittsöffnung ist in dem Bereich vorgesehen, in dem Lehnenabdeckung und Polster aneinander stoßen. Diese bekannte Anordnung bringt den Nachteil mit sich, dass bei einem Seitenaufprall in den Kraftwageninnenraum eindringende Strukturteile den störungsfreien Austritts des Airbags gefährden können. Dieser Fall kann beispielsweise dann eintreten, wenn die eindringenden Teile gegen die Lehnenabdeckung stoßen und diese verformen und so die Airbagaustrittsöffnung verdeckt oder das hinter .der Lehnenabdeckung angeordnete Airbagmodul beschädigt wird. Ein Verformen der Lehnenabdeckung ist möglich, da diese zur Verkleidung des Kraftwagensitzes dient und daher nicht ausreichend stabil ausgelegt ist.In the known safety device, the airbag module is arranged between the frame and the backrest cover, so that it is placed behind the backrest cover and in front of the frame when viewed from the side wall structure. An airbag outlet opening is provided in the area in which the backrest cover and the upholstery meet. This known arrangement has the disadvantage that structural parts penetrating into the interior of the motor vehicle in the event of a side impact can endanger the trouble-free emergence of the airbag. This can occur, for example, when the penetrating parts hit the backrest cover and deform it, thus covering the airbag outlet opening or the airbag module arranged behind the backrest cover being damaged. A deformation of the backrest cover is possible because of this serves to cover the motor vehicle seat and is therefore not designed to be sufficiently stable.
Vor diesem Hintergrund ist es Aufgabe der vorliegenden Erfindung eine gattungsgemäße Sicherheitseinrichtung derart wei- terzuentwickeln, dass ein zuverlässiges und reproduzierbares Austreten des Airbags gewährleistet ist.Against this background, it is the object of the present invention to further develop a generic safety device such that a reliable and reproducible emergence of the airbag is ensured.
Diese Aufgabe wird erfindungsgemäß durch eine Sicherheitseinrichtung mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by a safety device with the features of claim 1.
Demnach zeichnet sich die Erfindung dadurch aus, dass das Airbagmodul von der Seitenwandstruktur gesehen, hinter dem Lehnenrahmen - also hinter einem tragenden Teil in der Rückenlehne - angeordnet ist. Durch diese Anordnung wird erreicht, dass das Airbagmodul gegen aus Richtung der Seitenwandstruktur einwirkende Kräfte abgeschirmt ist. Zudem kann eine Airbagaustrittsöffnung wirkungsvoll vor eindringenden Strukturteilen geschützt und damit gewährleistet werden, dass die Öffnung immer frei für einen Airbagaustritt ist. Der Lehnenrahmen ist bevorzugt so ausgelegt, dass eine Verformung praktisch nicht auftritt. Es wird bei einer seitlichen Krafteinwirkung eher die gesamte Rückenlehne mit dem Sitzkissenteil in Richtung Kraftwagenmitte verschoben, als dass sich der Rahmen nachhaltig verformt. Ein derartiger Lehnenrahmen kann beispielsweise aus Magnesiumdruckguss bestehen.Accordingly, the invention is characterized in that the airbag module, viewed from the side wall structure, is arranged behind the backrest frame - that is, behind a load-bearing part in the backrest. This arrangement ensures that the airbag module is shielded against forces acting from the direction of the side wall structure. In addition, an airbag outlet opening can be effectively protected from penetrating structural parts and thus it can be ensured that the opening is always free for an airbag outlet. The backrest frame is preferably designed in such a way that deformation practically does not occur. In the event of a lateral force, the entire backrest with the seat cushion part is shifted towards the center of the motor vehicle rather than the frame being permanently deformed. Such a backrest frame can consist, for example, of die-cast magnesium.
Ein weiterer Vorteil der Erfindung ist darin zu sehen, dass der Aufbau sehr einfach ist, weil keine zusätzlichen Maßnahmen notwendig sind, um ein sicheres Entfalten des Airbags zu gewährleisten. Im Gegenteil, es werden vorhandene Teile der Rückenlehne genutzt, um dies zu bewerkstelligen. Durch die erfindungsgemäße Anordnung des Airbagmoduls in der Rückenlehne wird demnach ein erheblich zuverlässigeres Entfalten bzw. Austreten des Airbags gewährleistet. Gemäß einer Ausführungsform weist das Airbagmodul ein Gehäuse auf, welches den Airbag zumindest teilweise, beispielsweise im hinteren Bereich und in den Seitenbereichen, umschließt. Das Gehäuse weist also - dadurch dass es das Airbagmodul nicht vollkommen umschließt - eine relativ weite Öffnung auf. Dadurch setzt das Gehäuse dem sich entfaltenden Airbag einen relativ geringen Widerstand entgegen, wodurch ein zuverlässiges Entfalten unterstützt wird.Another advantage of the invention is that the structure is very simple because no additional measures are necessary to ensure that the airbag deploys safely. On the contrary, existing parts of the backrest are used to accomplish this. The arrangement of the airbag module in the backrest according to the invention accordingly ensures that the airbag deploys or exits considerably more reliably. According to one embodiment, the airbag module has a housing which at least partially encloses the airbag, for example in the rear area and in the side areas. The housing therefore has a relatively wide opening because it does not completely surround the airbag module. As a result, the housing opposes the deploying airbag with relatively little resistance, which supports reliable deployment.
In dem Bereich, in dem das Gehäuse das Airbagmodul nicht umschließt, kann ein Blech vorgesehen sein. Dieses Blech dient einmal dazu das Airbaggehäuse zu verschließen und somit den in dem Gehäuse angeordneten Airbagbestandteilen im Ruhezustand einen gewissen Schutz zu bieten. Des weiteren dient es dazu, den ersten Schub des sich entfaltenden Airbags zu dämpfen, so dass der Airbag mit einer moderaten Geschwindigkeit austritt. Schließlich macht das Blech den Austritt des, Airbags frei. Wenn der Airbag beim Entfalten gegen das Blech drückt, wird dieses aufgebogen und schiebt die Bestandteile der Rückenlehne zur Seite, die an da Blech anschließen, beispielsweise das Polster. Zu diesem Zweck ist das Blech bevorzugt an der Seite des Rahmens angeordnet, die von der der Seitenwandstruktur zugewandten Außenkontur des Sitzes wegweist.A sheet metal can be provided in the area in which the housing does not enclose the airbag module. This sheet serves once to close the airbag housing and thus to offer some protection to the airbag components arranged in the housing in the idle state. It is also used to dampen the first thrust of the deploying airbag so that the airbag deploys at a moderate speed. Finally, the metal sheet clears the airbag. If the airbag presses against the sheet when it is unfolded, it is bent open and pushes aside the components of the backrest that connect to the sheet, such as the cushion. For this purpose, the sheet metal is preferably arranged on the side of the frame which points away from the outer contour of the seat facing the side wall structure.
Das Blech kann einseitig fest mit dem Rahmen der Rückenlehne verbunden sein. Diese feste Verbindung bildet beim Austreten des Airbags ein Scharnier, um welches sich das Blech bewegt. Es ist aber auch denkbar, dass das Blech direkt mit dem Airbaggehäuse verbunden ist und von dieser Verbindung aus aufschwenkt .The sheet can be firmly connected on one side to the frame of the backrest. This firm connection forms a hinge around which the sheet metal moves when the airbag emerges. But it is also conceivable that the sheet metal is connected directly to the airbag housing and swings open from this connection.
Die Funktion des Bleches kann auch durch andere Bestandteile der Rückenlehne erfüllt werden. Ist beispielsweise das Polster auf einem Polsterträger angeordnet, so ist es denkbar, dass dieser Polsterträger, der ebenfalls zwischen Polster und Airbagmodul angeordnet ist, das Verschließen, Dämpfen und Öffnen übernimmt .The function of the sheet can also be fulfilled by other components of the backrest. If, for example, the cushion is arranged on a cushion carrier, it is conceivable that this cushion carrier, which is also between the cushion and Airbag module is arranged, which closes, dampens and opens.
Gemäß einer weiteren Ausführungsform umschließt der Rahmen das Airbagmodul zumindest teilweise. Bevorzugt umschließt der Rahmen das Airbagmodul in den Bereichen, in denen das Gehäuse den Airbag umschließt. Durch diese Anordnung ist der Airbag besonders sicher gegen Einwirkungen ■ von außen - insbesondere von hinten und von der Seite - geschützt, wodurch eine Beschädigung des Airbagmoduls verhindert wird, was ein störungsfreies Entfalten des Airbags gewährleistet. Diese Anordnung ist deshalb besonders vorteilhaft, weil keine zusätzlichen Elemente notwendig sind, um diesen Schutz zu erreichen. Der Airbag wird lediglich in schon vorhandenen Strukturen angeordnet. Der Rahmen kann zudem als Leitvorrichtung dienen, indem er so ausgerichtet ist, dass er die Entfaltungsrichtung vorgibt .According to a further embodiment, the frame at least partially surrounds the airbag module. The frame preferably encloses the airbag module in the areas in which the housing encloses the airbag. With this arrangement, the airbag is protected particularly reliably against influences from the outside, in particular from the rear and from the side, which prevents damage to the airbag module, which ensures that the airbag deploys smoothly. This arrangement is particularly advantageous because no additional elements are necessary to achieve this protection. The airbag is only arranged in existing structures. The frame can also serve as a guiding device in that it is aligned in such a way that it specifies the direction of deployment.
Der Austritt bzw. die Austrittsöffnung für den Airbag kann beispielsweise zwischen Rahmen und Polster vorgesehen sein. Die Materialkombination von steifem Rahmen und elastischem Polster, die zudem in ihrer Form aufeinander abgestimmt sind, ermöglicht es auf besonders einfache Weise eine Austrittsöffnung für einen Airbag vorzusehen, ohne zusätzliche Bauteile zu verwenden. Wenn Rahmen und Polster im Bereich der Austrittsöffnung nicht miteinander verbunden sind, wird das Polster beim Entfalten des Airbags durch die Kraft, die der Airbag ihm entgegenbringt, verformt und gibt dadurch den Weg frei für den Austritt des Airbags. Die erfindungsgemäße Anordnung ist optisch ansprechend, weil man die Öffnung nicht sieht. Zudem sind weder Nähte noch sonstige bekannte Verschlusselemente notwendig. Dadurch wird zum einen eine einfache und damit auch kostengünstige Lösung vorgeschlagen. Zum anderen sind keine den Austritt des Airbags möglicherweise behindernde Elemente vorgesehen. Die Austrittsöffnung kann beispielsweise in dem der Seitenwandstruktur zugewandten Bereich des Kraftwagensitzes angeordnet sein. Wenn die Entfaltungsrichtung schräg nach vorne weist, ergibt sich eine besonders vorteilhafte Positionierung des Airbags beim Entfalten und in entfaltetem Zustand.The outlet or the outlet opening for the airbag can be provided, for example, between the frame and the cushion. The combination of materials of rigid frame and elastic cushion, which are also coordinated in their shape, makes it possible to provide an outlet opening for an airbag in a particularly simple manner without using additional components. If the frame and the cushion are not connected to one another in the area of the outlet opening, the cushion is deformed when the airbag is deployed by the force that the airbag brings against it, thereby clearing the way for the airbag to exit. The arrangement according to the invention is visually appealing because the opening cannot be seen. In addition, no seams or other known closure elements are necessary. On the one hand, this suggests a simple and therefore also inexpensive solution. On the other hand, there are no elements that possibly prevent the airbag from escaping. The outlet opening can be arranged, for example, in the region of the motor vehicle seat facing the side wall structure. If the direction of deployment points obliquely forward, the airbag is particularly advantageously positioned when it is deployed and in the deployed state.
Im folgenden wird die Erfindung anhand dem in der Zeichnung dargestellten Ausführungsbeispiel des näheren erläutert. Es zeigen:The invention is explained in more detail below with reference to the exemplary embodiment shown in the drawing. Show it:
Fig. 1: eine Seitenansicht einer Rückenlehne eines Kraftwagensitzes von der Seitenwandstruktur aus gesehen;1: a side view of a backrest of a motor vehicle seat seen from the side wall structure;
Fig. 2: einen Schnitt durch einen der Seitenwandstruktur zugewandten Seitenbereich eines Kraftwagensitzes mit • einer erfindungsgemäßen Sicherheitseinrichtung im Ruhezustand gemäß der Linie II-II in Fig. 1 und2 shows a section through a side region of a motor vehicle seat facing the side wall structure with a safety device according to the invention in the idle state according to line II-II in FIGS. 1 and
Fig. 3: einen der Fig. 2 entsprechenden Schnitt mit einer aktivierten Sicherheitseinrichtung.3: a section corresponding to FIG. 2 with an activated safety device.
In Fig. 1 ist eine Rückenlehne 1 dargestellt, die mit einem nicht dargestellten Sitzkissenteil einen Kraftwagensitz bildet. Die Rückenlehne 1 weist eine Kopfstütze 2 auf. In der Seitenansicht ist eine Lehnenabdeckung 3 zu erkennen, die den rückwärtigen Teil der Rückenlehne 1 verkleidet. Des weiteren ist ein Polster 4 zu erkennen, welches den nach vorne weisenden Teil der Rückenlehne 1 bildet und einem Fahrer ein komfortables Sitzen ermöglicht. In der dargestellten Ausführungsform ist zudem ein Lehnenrahmen 5 zu erkennen. Dieser ist sichtbar angeordnet, er bildet einen Teil der Außenkontur des Kraftwagensitzes. Es ist jedoch auch denkbar, einen solchen Lehnenrahmen auf geeignete Art und Weise zu verkleiden, beispielsweise durch die Lehnenabdeckung 3, die im Seitenbereich des Kraftwagensitzes weiter nach vorne gezogen ist, oder durch ein Poster 4. In der Rückenlehne ist ein Airbagmodul angeordnet. Das. geht aus Fig. 2 hervor, die eine Schnittdarstellung des der Kraftwagenseite zugewandten Bereichs einer Rückenlehne 1 gemäß der Linie II-II in Fig. 1 darstellt. Der Pfeil A weist in Fahrtrichtung nach hinten und der Pfeil B weist in Fahrtrichtung nach vorne. In dem nach hinten weisenden Bereich ist die Lehnenabdeckung 3 dargestellt. Diese deckt neben der Rückseite der Rückenlehne 1 Teile der in Richtung Seitenwandstruktur weisenden Seitenbereiche der Rückenlehne 1 ab. Die nach vorne weisende Seite der Rückenlehne 1 wird durch das Polster 4 gebildet. Dies ist auf einen Polsterträger 6 aufgebracht.In Fig. 1, a backrest 1 is shown, which forms a motor vehicle seat with a seat cushion part, not shown. The backrest 1 has a headrest 2. In the side view, a backrest cover 3 can be seen, which covers the rear part of the backrest 1. Furthermore, a cushion 4 can be seen, which forms the forward-facing part of the backrest 1 and enables a driver to sit comfortably. In the illustrated embodiment, a backrest frame 5 can also be seen. This is visibly arranged, it forms part of the outer contour of the motor vehicle seat. However, it is also conceivable to cover such a backrest frame in a suitable manner, for example by the backrest cover 3, which is pulled further forward in the side region of the motor vehicle seat, or by a poster 4. An airbag module is arranged in the backrest. The. 2 that shows a sectional illustration of the region of a backrest 1 facing the motor vehicle side according to line II-II in FIG. 1. Arrow A points to the rear in the direction of travel and arrow B points to the front in the direction of travel. The backrest cover 3 is shown in the rear-facing area. In addition to the rear of the backrest 1, this covers parts of the side regions of the backrest 1 pointing in the direction of the side wall structure. The forward-facing side of the backrest 1 is formed by the cushion 4. This is applied to a cushion support 6.
Zwischen Lehnenabdeckung 3 und Polster 4 ist der Rahmen 5 angeordnet. Im dargestellten Ausführungsbeispiel bilden Lehnenabdeckung 3, Rahmen 5 und Polster 4 die Außenkontur der Rückenlehne 1. Sie stoßen jeweils an den Punkten 7 bzw. 8 zusammen. Es ist aber auch denkbar, dass der Rahmen 5 im Inneren der Rückenlehne 1 angeordnet und beispielsweise durch Lehnenabdeckung 3 und/oder Polster 4 verdeckt ist. In diesem Fall stoßen Polster 4 und Lehnenabdeckung 3 an der Außenkontur des Sitzes zusammen.The frame 5 is arranged between the backrest cover 3 and the cushion 4. In the exemplary embodiment shown, backrest cover 3, frame 5 and cushion 4 form the outer contour of the backrest 1. They collide at points 7 and 8, respectively. However, it is also conceivable for the frame 5 to be arranged in the interior of the backrest 1 and, for example, to be covered by the backrest cover 3 and / or cushion 4. In this case, the upholstery 4 and the backrest cover 3 meet on the outer contour of the seat.
Der Rahmen 5 hat einen im wesentlichen u-förmigen Querschnitt, dessen Öffnung 9 nach vorne gerichtet ist. In dem durch den u-förmigen Rahmen 5 umgebenden Raum ist ein Airbagmodul 11 angeordnet. Der Rahmen 5 erstreckt sich also zwischen dem Airbagmodul 11 und der Seitenwandstruktur des Kraftwagens. Das Airbagmodul 11 besteht aus allgemein üblichen Komponenten, auf die an dieser Stelle nicht näher eingegangen wird. In Fig. 2 dargestellt ist ein Airbaggehäuse 12, dessen Querschnittsform an die des Rahmens 5 angepasst ist. Eine Öffnung 13 des Airbaggehäuses 12 weist in dieselbe Richtung, wie die Öffnung 9 des Rahmens 5, nämlich in Fahrtrichtung. Die Öffnung 13 des Airbaggehäuses 12 ist mit einem Blech 14 versehen. Das Blech 14 ist auf dem der Außenkontur der Rückenlehne 1 äbgewandten Ende des Rahmens 5 mit dem Rahmen 5 verbunden. Das andere Ende des Bleches 14 liegt an dem Airbaggehäuse 12 an. Das Blech 14 ist zwischen dem Airbagmodul 12 und dem Polster 4 angeordnet.The frame 5 has an essentially U-shaped cross section, the opening 9 of which is directed towards the front. An airbag module 11 is arranged in the space surrounded by the U-shaped frame 5. The frame 5 thus extends between the airbag module 11 and the side wall structure of the motor vehicle. The airbag module 11 consists of generally customary components, which are not discussed in more detail here. 2 shows an airbag housing 12, the cross-sectional shape of which is adapted to that of the frame 5. An opening 13 of the airbag housing 12 points in the same direction as the opening 9 of the frame 5, namely in the direction of travel. The opening 13 of the airbag housing 12 is provided with a sheet 14. The plate 14 is connected to the frame 5 on the end of the frame 5 facing away from the outer contour of the backrest 1. The other end of the sheet 14 is on the Airbag housing 12. The sheet 14 is arranged between the airbag module 12 and the cushion 4.
An dem Punkt 8, also an dem Punkt, den dem Lehnenrahmen 5 und Polsterträger 6 zusammenstoßen, ist eine Airbagaustrittsöff~ nung vorgesehen. Lehnenrahmen 5 und Polster 6 sind in diesem Bereich nicht miteinander verbunden. Sie stoßen lediglich aneinander und bilden aufgrund ihrer aneinander angepassten Formen eine geschlossene Kontur. Die Airbagaustrittsöffnung ist also von außen nicht sichtbar. Es sind aber auch keine zusätzlichen Elemente bzw. Strukturen notwendig, ■ um die Öffnung zu verschließen.An airbag outlet opening is provided at point 8, that is to say at the point that the backrest frame 5 and cushion support 6 meet. Backrest frame 5 and cushion 6 are not connected to one another in this area. They only abut each other and form a closed contour due to their mutually adapted shapes. The airbag outlet opening is therefore not visible from the outside. But there are also no additional elements or structures necessary to close ■ around the opening.
In Fig. 3 ist ein sich entfaltender Airbag 15 dargestellt. Der Airbag 15 hat bereits das Blech 14 beim Entfalten um eine Schwenkachse 16 nach außen gedrückt. Das Blech 14 wiederum hat den Polsterträger 6 mit dem darauf aufgebrachten Polster 4 mitbewegt. Dadurch wird eine Austrittsfuge bzw. -Öffnung b gebildet, die den Weg für den Airbag freigibt. Dadurch das der Airbag 15 zunächst gegen das Blech 14 stößt, wird der erste Impuls des sich entfaltenden Airbags 15 gedämpft. Der Airbag 15 tritt dadurch mit gedrosselter Geschwindigkeit aus. Zudem dient das Blech 14 dazu, den Weg für den austretenden Airbag 15 frei zu machen. Der Rahmen 5 erfüllt bezogen auf die erfindungsgemäße Sicherheitsvorrichtung zwei Aufgaben. Zum einen schirmt er sie gegen Krafteinwirkungen aus dem Bereich der Seitenwand ab und verhindert dadurch, dass die Austrittsöffnung blockiert wird. Zum anderen unterstützt er den Airbag 15 darin, sich in die richtige Richtung zu entfalten. An unfolding airbag 15 is shown in FIG. 3. The airbag 15 has already pressed the sheet 14 outward when it is unfolded about a pivot axis 16. The sheet 14 in turn has moved the cushion carrier 6 with the cushion 4 applied thereon. As a result, an exit joint or opening b is formed, which clears the way for the airbag. As a result of the airbag 15 initially bumping against the sheet 14, the first pulse of the deploying airbag 15 is damped. The airbag 15 thus exits at a reduced speed. In addition, the sheet 14 serves to clear the way for the emerging airbag 15. The frame 5 fulfills two tasks with respect to the safety device according to the invention. On the one hand, it shields them from the effects of forces from the area of the side wall and thereby prevents the outlet opening from being blocked. On the other hand, it supports the airbag 15 in deploying in the right direction.

Claims

DaimlerChrysler AGPatentansprüche DaimlerChrysler AG patent claims
1. Sicherheitseinrichtung für einen Kraftwagensitz mit einem Sitzkissenteil und einer Rückenlehne, wobei die Rückenlehne einen Rahmen, eine in Fahrtrichtung gesehen nach hinten weisende Lehnenabdeckung sowie ein in Fahrtrichtung gesehen nach vorne weisendes Polster aufweist und in die Rückenlehne ein Airbagmodul integriert ist, welches in dem der Kraftwagenseitenwandstruktur zugewandten Bereich der Rückenlehne so angeordnet ist, dass sich ein Airbag bei einem Aufprall zwischen einem Fahrer und der Kraftwagenseitenwand entfaltet, d a d u r c h g e k e n n z e i c h n e t, d a s s der Rahmen 5 das Airbagmodul 11 zumindest teilweise umschließt .1.Safety device for a motor vehicle seat with a seat cushion part and a backrest, the backrest having a frame, a backrest cover pointing in the direction of travel and a cushion facing forward in the direction of travel and an airbag module integrated in the backrest, in which the Region of the backrest facing the motor vehicle side wall structure is arranged such that an airbag deploys in the event of an impact between a driver and the motor vehicle side wall, characterized in that the frame 5 at least partially surrounds the airbag module 11.
2. Sicherheitseinrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, d a s s das Airbagmodul 11 ein Gehäuse 12 aufweist, welches den Airbag 15 in zusammengefalteten Zustand' zumindest teilweise umschließt.2. Safety device according to claim 1, d a d u r c h g e k e n n z e i c h n e t, that the airbag module 11 has a housing 12 which 'at least partially encloses the airbag 15 in the folded state'.
3. Sicherheitsvorrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, d a s s das Gehäuse 12 den Airbag 15 in seinem in Fahrtrichtung gesehen nach hinten weisenden Bereich und in den Seitenbereichen umschließt.3. Safety device according to claim 1 or 2, d a d u r c h g e k e n e z e i c h n e t, that the housing 12 encloses the airbag 15 in its rear-facing area in the direction of travel and in the side areas.
4. Sicherheitsvorrichtung nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n -z e i c h n e t, d a s s das in dem Bereich, in dem das Gehäuse 12 das Airbagmodul4. Safety device according to one of the preceding claims, d a d u r c h g e k e n n-z e i c h n e t, d a s s that in the area in which the housing 12 the airbag module
11 nicht umschließt ein Blech 14 vorgesehen ist. 11 does not enclose a sheet 14 is provided.
5. Sicherheitsvorrichtung nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t, d a s s das Blech 14 zumindest einseitig mit dem Rahmen 5 verbunden ist.5. Safety device according to claim 4, d a d u r c h g e k e n n z e i c h n e t d a s s the sheet 14 is connected at least on one side to the frame 5.
6. Sicherheitsvorrichtung nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, d a s s eine Airbagaustrittsöffnung b zwischen Rahmen 5 und Polster 4 vorgesehen ist.6. Safety device according to one of the preceding claims, that a airbag outlet opening b is provided between frame 5 and cushion 4.
7. Sicherheitsvorrichtung nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t, d a s s Rahmen 5 und Polster 4 im Bereich der Airbagaustrittsöff- nung b nicht miteinander verbunden sind.7. The safety device as claimed in claim 6, which means that the frame 5 and cushion 4 are not connected to one another in the region of the airbag outlet opening b.
8. Sicherheitsvorrichtung nach Anspruch 6 oder 7, d a d u r c h g e k e n n z e i c h n e t, d a s s das Polster 4 im Bereich der Airbagaustrittsöffnung b so elastisch ausgebildet ist, dass es beim Entfalten des Airbags 15 die Austrittsöffnung b freigibt.8. Safety device according to claim 6 or 7, ie, the cushion 4 in the area of the airbag outlet opening b is designed to be so elastic that it releases the outlet opening b when the airbag 15 is deployed.
9. Sicherheitsvorrichtung nach einem der Ansprüche 6 bis 8, d a d u r c h g e k e n n z e i c h n e t, d a s s die Airbagaustrittsöffnung b in dem der Seitenwandstruktur zugewandten Bereich der Rückenlehne 1 angeordnet ist. 9. Safety device according to one of claims 6 to 8, that the airbag outlet opening b is arranged in the region of the backrest 1 facing the side wall structure.
EP02772110A 2001-08-03 2002-07-30 Safety device for a motor vehicle seat Withdrawn EP1412231A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10137634A DE10137634A1 (en) 2001-08-03 2001-08-03 Airbag safety system for vehicle seats has airbag module mounted behind backrest frame and set in housing which surrounds rear facing area and side areas
DE10137634 2001-08-03
PCT/EP2002/008456 WO2003013915A1 (en) 2001-08-03 2002-07-30 Safety device for a motor vehicle seat

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EP1412231A1 true EP1412231A1 (en) 2004-04-28

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US (1) US7100992B2 (en)
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JP (1) JP3932554B2 (en)
DE (1) DE10137634A1 (en)
WO (1) WO2003013915A1 (en)

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Also Published As

Publication number Publication date
JP3932554B2 (en) 2007-06-20
WO2003013915A1 (en) 2003-02-20
DE10137634A1 (en) 2003-02-20
JP2004537461A (en) 2004-12-16
US7100992B2 (en) 2006-09-05
US20050006933A1 (en) 2005-01-13

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