WO2020156953A1

WO2020156953A1 - Airbag arrangement for a vehicle occupant restraint system

Info

Publication number: WO2020156953A1
Application number: PCT/EP2020/051781
Authority: WO
Inventors: Mingxi Yan; Tobias Pausch; Koshan Mahdi
Original assignee: Joyson Safety Systems Germany Gmbh
Priority date: 2019-01-29
Filing date: 2020-01-24
Publication date: 2020-08-06
Also published as: DE102019124091A1

Abstract

The invention relates to an airbag arrangement (100) for a seat-based vehicle occupant restraint system, with at least one first and one second airbag (120, 140) which can be inflated to protect a vehicle occupant (P). The at least one first and second airbag (120, 140) can be arranged in each case on a vehicle seat (S). In the inflated state of the airbags (120, 140), an overlapping section (122) of the first airbag (120) overlaps an overlapping section (142) of the second airbag (140).

Description

Airbag assembly for a vehicle occupant restraint system

description

The invention relates to an airbag arrangement. It also relates to a vehicle occupant restraint system and a vehicle seat each comprising such an airbag arrangement.

Vehicle seats often allow a user a variety of positioning options, for example in relation to an angle of inclination of a backrest or other seat parts or in relation to a displacement of the vehicle seat in the horizontal and vertical directions. In addition, various types of positioning options are often provided to a user in vehicles of different vehicle classes, such as cars, passenger ships, or trains. There is also a need for further positioning options for a vehicle seat from various driving modes, such as autonomous driving.

A variety of positioning options for a vehicle seat make it more difficult to provide effective accident protection devices for vehicle occupants. In particular, in some seating positions, an occupant occupying the vehicle seat can no longer be ideally positioned relative to a restraint device, such as an airbag arrangement, mounted on the vehicle. In the event of a crash, the gas bag arrangement can only insufficiently or not develop its restraining effect. The problem on which the invention is based is to create an airbag arrangement which can optimally protect a vehicle occupant located on a vehicle seat, regardless of the position or orientation of the vehicle seat in the event of a crash.

This problem is solved by an airbag arrangement with the features of claim 1. Further developments of the invention are specified in the dependent claims.

The gas bag arrangement according to the invention is then provided for a seat-based vehicle occupant restraint system and comprises at least a first and at least a second gas bag which is inflatable to protect the vehicle occupant. The first and the second gas bag are each to be arranged on a vehicle seat. The first and the second gas bag have an overlap section, the overlap section of the first gas bag overlapping with the overlap section of the second gas bag when the gas bags are inflated.

When the airbags are inflated, the second airbag can at least partially surround the first airbag in the region of the overlap sections of the first and second airbags. In addition, the second airbag can at least partially surround the first airbag with respect to an intended position of the vehicle occupant. When the gas bags are inflated, the overlap sections can be in front of the vehicle occupant (who is seated on the vehicle seat as intended) and in particular can be in (mechanical) contact with one another.

In this case, the gas bag arrangement can comprise connecting means by means of which the overlapping sections, when they approach each other, can be connected and (at least partially) are connected to one another or adhere to one another when the gas bags are inflated. The connecting means can comprise, for example, a Velcro connector, a magnetic connector or an adhesive. A connecting means is understood to mean generalizing means which prevent the overlapping sections from moving away from one another. These include, for example, surfaces with an increased coefficient of friction or gas bag structures that can be brought into engagement with one another. In particular, it can also be provided that the connecting means can be separated from one another (only) along a predetermined direction by moving the connecting means. The first gas bag and the second gas bag can each have a frontal section and a lateral (supply) section. The frontal section and the lateral section of an airbag can be formed by a single airbag chamber. In the state of the gas bag arrangement that is intended to be arranged on the vehicle seat and in the inflated state of the gas bags, the frontal section can extend in a plane that is essentially parallel to the seat width direction and to the longitudinal direction of the seat, and the lateral section can extend in a plane transverse to the seat width direction. The frontal section and the lateral section can thus extend at an angle to one another. The side section (in the intended state of the gas bag arrangement on a vehicle seat) is arranged between the backrest of the vehicle seat and the associated frontal section. For example, the lateral sections can each protrude from the backrest transversely to the seat width direction, so that they can extend to the left and right of an occupant seated on the vehicle seat as intended. The frontal section of the first (second) gas bag can then extend along the seat width direction in the direction of the lateral section of the second (first) gas bag. The frontal sections can at least partially overlap and form or encompass the overlap sections according to the invention.

When the gas bags are inflated, the frontal section can have a larger volume than the lateral section.

According to one embodiment, the first and / or the second gas bag can comprise at least two gas bag chambers which are fluidly connected to one another. Adjacent gas bag chambers are separated by a wall, but are in flow connection by means of a passage opening or overflow opening. At least one gas bag chamber can form the frontal section and at least one gas bag chamber can form the lateral section. The at least one gas bag chamber that forms the frontal section can have a larger volume than the at least one gas bag chamber that forms the lateral section.

The first airbag and / or the second airbag can (respectively) comprise a main chamber and a secondary chamber, the secondary chamber being fluidly connected to the corresponding main chamber. The secondary chamber can have a smaller volume than the main chamber when inflated. Furthermore, the main chamber can be used to form the frontal section, while the secondary chamber can be used to form the lateral section. It is also conceivable that a plurality of gas bag chambers form the lateral section and are arranged in succession transversely to the seat width direction. Another gas bag chamber can then form the frontal section, for example. In this case (in the inflated state of the gas bags) the volume of all gas bag chambers that form the lateral section can be greater than the volume that forms the frontal gas bag chamber. It is also conceivable that several chambers each form the frontal and the lateral section.

One embodiment provides that at least one gas bag chamber is oriented essentially vertically and is elongated (for example as a tube). A vertical alignment is to be understood as an alignment which corresponds to the longitudinal direction of the seat in the gas bag arrangement when it is properly arranged on the vehicle seat. The longitudinal direction of the seat can essentially be regarded as corresponding to the longitudinal direction of the upper body of the occupant seated on the vehicle seat as intended. In particular, at least one of the gas bag chambers that form the lateral section of the first or second gas bag can be designed as a vertically aligned tube. The gas bag chamber (s) of the frontal section of the first or second gas bag can have a shape that deviates from the vertically extending tube shape.

According to one embodiment, the (tubular) gas bag chambers of a gas bag, in particular of the lateral section of the gas bag, are arranged with respect to one another and fastened to one another in such a way that the gas bag chambers in the inflated state, viewed in a horizontal cross-sectional plane, follow one another (directly) in a row and in particular along one Extend curvature. From the point of view of an occupant located on the vehicle seat, the curvature can in particular be designed to be concave, so that there is a depression for receiving the upper body of the occupant.

An overflow opening can be provided between two (directly) adjacent gas bag chambers of the at least two gas bag chambers of a gas bag in order to fluidly connect the two adjacent gas bag chambers to one another. Due to the fluidic connection of gas bag chambers, these can be filled with gas by means of a single gas generator. For this purpose, one of the at least two gas bag chambers can have an inflow opening (inlet opening) via which gas from the gas generator can be introduced into the gas bag. The inflow opening can be designed with respect to the overflow opening of this gas bag chamber in such a way that gas generated by the gas generator flows out of the gas generator into the at least two gas bag chambers in succession. The Inflow opening can for example be positioned such that the fluidically connected gas bag chambers and the gas generator are connected in a row, so that gas generated by the gas generator flows from the gas generator into the gas bag chamber closest to the gas generator (first gas bag chamber) and from there successively into the next ( n) gas bag chamber (s), so that the individual gas bag chambers are successively filled with gas. The size of the overflow opening between two adjacent gas bag chambers can be dimensioned such that the maximum degree of filling of the gas bag chamber closest to the gas generator (first gas bag chamber) is reached before the maximum degree of filling of the subsequent gas bag chamber (s) (second etc. gas bag chamber) is reached.

The overflow openings do represent a preferred embodiment for setting a flow resistance of the fluidic connection between adjacent gas bag chambers. However, instead of an overflow opening, a gas-permeable fabric can be provided which enables a fluidic connection between adjacent gas bag chambers.

In general, all gas bag chambers of the first or second gas bag can be fluidly connected to one another and to a gas generator, so that all gas bag chambers of a gas bag can be filled with gas by means of a gas generator. For example, a gas generator can be assigned to the first gas bag and a further gas generator can be assigned to the second gas bag and be fluidly connected to it. The two gas generators can be triggered with a time delay and / or differ in terms of a gas delivery performance in order to achieve a time-delayed inflation of the two gas bags. It is also conceivable that a single gas generator serves to provide gas for the first and the second gas bag. Here, a fluidic connection between the first and the second gas bag can be realized by means of an additional connection chamber, which connects the first and the second gas bag to the gas generator. The gas generator can be designed to fill the first and second gas bags with gas at different times. In order to fill the gas bags at different times, the individual gas generator can be arranged off-center, for example with respect to the first and second gas bags. A supply line from the gas generator to one of the first and second gas bags can also be opened with a time delay with respect to a triggering of the gas generator by means of an (electromagnetic) valve device. Additionally or alternatively, a feed line to one of the first and second gas bags and a feed line to the other of the first and second gas bags can be in relation to one another Differentiate the transmission rate, for example in that the feed lines have different lengths and / or cross sections.

In the inflated state of the gas bags and in the intended state of the gas bag arrangement on a vehicle seat, the cross section (viewed in a horizontal cross-sectional plane) of this gas bag between two adjacent gas bag chambers of a gas bag may be smaller than the cross section of the two adjacent gas bag chambers. The cross section can be reduced to such an extent that the gas bag forms a desired kink in the area of the reduced cross section. In particular, such a predetermined kink can be formed between an airbag chamber of the frontal section and an airbag chamber of the side section.

Tether straps can be provided to shape the first and second gas bags when inflated. The tether can be attached to several points of a material layer of the first or second gas bag. It is also conceivable that a tether is not only attached to an airbag, but also to a vehicle seat or a structure attached to the vehicle seat. In addition to the shape, tether straps also serve to stabilize the relative arrangement of the gas bag chambers to one another and / or the relative arrangement of the gas bags in the inflated state of the gas bags to a reference, in particular a vehicle seat. A tether can in particular be designed and attached in such a way that it supports kinking of the first or second gas bag between the frontal and the lateral section. For this purpose, the tether can extend between the frontal section and the lateral section and in particular can be fixed on the one hand to the frontal section and on the other hand to the lateral section. This applies to gas bags with one or more gas bag chambers. In particular, in the case of gas bags with a plurality of gas bag chambers, the desired kink and the tether can be coordinated with one another in such a way that the gas bag kinks at the desired kink. In addition, the tether can be provided to give the frontal section and / or the side section a specific shape when inflated. For this purpose, tether straps can be arranged in the interior of the frontal or lateral section. For example, the frontal section or the gas bag chamber that forms the frontal section (from the point of view of the vehicle occupant who is seated on the vehicle seat as intended) can be concave in the state of the gas bag arrangement which is arranged as intended on a vehicle seat and concave in the inflated state of the first or second gas bag be curved. From the point of view of the vehicle occupant, this gas bag chamber represents the last gas bag chamber of the Gas bags. The concave curvature forms a trough facing the vehicle occupant. As an alternative to tether straps, this curvature (trough) can be achieved by appropriately cutting the material layers that form the frontal section.

The frontal section of the first and / or the second gas bag can extend in front of a vehicle occupant who is seated as intended on a vehicle seat. The frontal section can cover an abdomen area of the vehicle occupant. Additionally or alternatively, the frontal section can cover a head region of the vehicle occupant. The abdomen area and / or the head area of the vehicle occupant can additionally be covered on both sides by the lateral section of the first and the second gas bag. The side section can also extend into the pelvic area of the vehicle occupant. In particular, gas bag chambers which are designed as essentially vertically oriented tubes (and in particular form the lateral section) can extend into the head region and / or the pelvic region of the occupant sitting on the vehicle seat.

According to a further embodiment, the airbag arrangement has a first and a second airbag which, in the inflated state and in the state of the airbag arrangement arranged as intended on a vehicle seat, extend on opposite sides next to the head region and in front of the chest region of the occupant sitting on the vehicle seat. The first and the second airbag have an arc shape (C-shape, banana shape), the curvature of which lies in a plane that extends essentially perpendicular to the direction of the seat width. This form largely prevents contact with the occupant's arms, which could hinder the unfolding of the gas bags. An airbag shaped in this way is also compatible with different statures of the vehicle occupant. An overlap section of the first and second gas bags extends in front of the chest area of the vehicle occupant. The overlapping sections can in particular be attached to one another when the gas bags are inflated. The first and the second gas bag can each be designed as a gas bag chamber.

It is conceivable that one (the first) of the two gas bags comprises a main chamber and a secondary chamber, which are fluidly connected to one another. The main chamber can have a larger volume than the secondary chamber when the gas bag is inflated. In the inflated state, the main chamber can extend laterally next to the head area and in front of the chest area of the occupant sitting on the vehicle seat and can have the C-shape. When the gas bags are inflated, the secondary chamber can overlap with the other (second) of the two gas bags and for example by a connecting means (as already described in connection with other embodiments) with the other (second) gas bag. By connecting the two gas bags via the secondary chamber, the connecting means can be subjected to shear stress. The other (second) gas bag can have only one gas bag chamber. The main chamber of one (first) gas bag can correspond to the gas bag chamber of the other (second) gas bag in terms of shape and size. In addition, the other (second) gas bag can also have a main chamber and a secondary chamber, wherein the main chambers of the two gas bags can be essentially identical in terms of shape (C-shape) and size. The secondary chamber of the first (second) gas bag can thus overlap with the main chamber of the second (first) gas bag, with which it is not fluidly connected

The secondary chamber (s) can extend in the inflated state of the gas bags in front of the chest area of the occupant sitting on the vehicle seat. Alternatively, an expansion in front of the head area is conceivable. The secondary chamber (s) can also extend in front of the chest area and the head area.

To stabilize the gas bag arrangement when the gas bags are inflated, a tether can be provided which connects the first and second gas bags to one another. When the gas bag arrangement is properly arranged on a vehicle seat, the tether can extend in particular behind the head region of the occupant sitting on the vehicle seat.

Furthermore, one or more fastening means can be provided for stabilization, which are used to fasten the first and second gas bags to the vehicle seat. The fastening means can be designed as a tether that is fixed on the one hand to the vehicle seat and on the other hand to the first or second gas bag. The fastening means can each be arranged in a section of the gas bag which, as intended, extends next to the head region. For example, one fastening means can be provided at the upper end of this section and another fastening means at the lower end of this section.

To fill the gas bags with a gas, the gas bags can be fluidly connected to a gas generator as already described in connection with other embodiments. According to a further embodiment, the gas bag arrangement comprises at least a first and a second gas bag which is inflatable to protect a vehicle occupant, the gas bags each being arranged on a vehicle seat and each having a shell shape in the inflated state. The shell shape is such that it serves to hold a shoulder of a vehicle occupant who is intended to be seated on the vehicle seat. To form the shell shape, the first and the second airbag each have a lateral section which extends in a plane transverse to the seat width direction, an upper section which extends in a plane transverse to the longitudinal direction of the seat, and a frontal section which extends in one plane extends transversely to the lateral section and transversely to the upper section. The longitudinal direction of the seat extends essentially perpendicular to the direction of the seat width and essentially corresponds to the longitudinal direction of the upper body of an occupant who is intended to be seated on the vehicle seat. The side section borders the top section and the front section. The upper section borders the lateral section and the frontal section. The frontal section borders the upper section and the lateral section. In this case, when the gas bag arrangement is arranged as intended, on a vehicle seat and when the gas bags are inflated, the lateral and the upper section are arranged between the backrest on the one hand and the frontal section on the other hand. Thus, an occupant's shoulder is positioned between the backrest and the frontal section. The upper portion extends in the seat width direction as viewed from the side portion toward the center of the seat width.

The three sections can be formed together by a single gas bag chamber or by one gas bag chamber each, in which case the individual gas bag chambers can be fluidly connected to one another.

It can be provided that in the inflated state of the gas bags, the frontal sections of the first and second gas bags touch or overlap in sections. The corresponding contact sections or overlap sections can extend in front of the occupant's chest area when the gas bags are inflated. The contact sections or overlap sections can have connecting means, via which the contact sections or overlap sections can be connected to one another and are connected to one another when the gas bags are inflated. The connecting means can be connecting means which have already been described in connection with other embodiments. The connection of the two gas bags to one another can ensure that the shoulders of the occupant do not slip out of the cup-shaped gas bags when the upper body of the occupant presses on the frontal sections in the accident situation. The first and the second gas bag can each comprise a main chamber, each main chamber forming the shell shape described. The main chambers can have an identical shape and a mirror-symmetrical orientation. In addition, the first and / or the second gas bag can comprise a secondary chamber which is fluidly connected to the main chamber of the first and second gas bags. When the gas bags are inflated, the secondary chamber can have a smaller volume than the main chamber.

It is conceivable that one (the first) of the two gas bags comprises a main chamber and a secondary chamber, which are fluidly connected to one another. In the inflated state of the gas bags, the secondary chamber can overlap with the other (second) of the two gas bags, in particular with its frontal section, and for example by a connecting means (as already described in connection with other embodiments) with the other (second) gas bag or its frontal section Section. By connecting the two gas bags via the secondary chamber, the connecting means can be subjected to shear stress.

The other (second) gas bag can have only one gas bag chamber. The main chamber of one (first) gas bag can correspond to the gas bag chamber of the other (second) gas bag in terms of shape (shell shape) and size. In addition, the other (second) gas bag can also have a main chamber and a secondary chamber, the main chambers of the two gas bags being essentially identical in shape (shell shape) and size. The secondary chamber of the first (second) gas bag can thus overlap with the main chamber of the second (first) gas bag, with which it is not fluidly connected

The secondary chamber (s) can extend in the inflated state of the gas bags in front of the chest area or in front of the head area of the occupant sitting on the vehicle seat. For this purpose, the secondary chamber (s) can be arranged on the frontal section of the corresponding main chamber. In particular, a side chamber in the head area can have an additional protective effect in addition to the stabilizing effect.

The invention also relates to a vehicle occupant restraint system. The vehicle occupant restraint system comprises an airbag arrangement according to the invention and at least one gas generator (inflator) which is designed, the first airbag and the second Fill the gas bag with a gas. The vehicle occupant restraint system is designed such that the at least one gas generator fills the first and second gas bags with gas at different times. In particular, the vehicle occupant restraint system can be designed such that first the first gas bag is (completely) inflated and then the second gas bag, the second gas bag at least partially surrounding the first gas bag in the inflated state. Design options for the inflator are already listed above.

The invention also relates to a vehicle seat which comprises an airbag arrangement according to the invention or a vehicle occupant restraint system according to the invention. The first airbag and the second airbag or the vehicle occupant restraint system can each be detachably attached to the vehicle seat so that they can be replaced after a triggering event. One or more tether straps can be fastened to the vehicle seat, which straps are also fastened to the first or second airbag and serve to shape and / or stabilize the airbags. The gas bags can at least partially oppose each other in the folded width direction in the seat width direction. In the folded state, the gas bags can be arranged in opposite lateral sections of a backrest, a seat surface or a headrest of the vehicle seat or in opposite armrests of the vehicle seat.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the figures. Show it:

Fig. 1 is a schematic representation of an airbag arrangement for a

Vehicle occupant restraint system according to one embodiment;

2A-2D are schematic representations of different stages of a triggering process of the gas bag arrangement for a vehicle occupant restraint system from FIG. 1;

Fig. 3-6 schematic representations of a vehicle seat with a

Airbag arrangement according to various embodiments in a top view from above;

Fig. 7-12 schematic representations of a vehicle seat with a

Airbag arrangement according to further embodiments in a side view; 13-14 schematic representations of a vehicle seat with an airbag arrangement according to various embodiments in a top view from above;

15 shows a schematic illustration of a gas bag arrangement with inner tether straps in a frontal view according to an embodiment of the invention;

16-19 are schematic representations of an occupant sitting on a vehicle seat and surrounded by an airbag arrangement to illustrate various possibilities for the occupant to free themselves from the airbag arrangement; and

20-26 schematic representations of a vehicle seat with a

Airbag arrangement according to further embodiments in a perspective view.

FIG. 1 shows a schematic illustration of an airbag arrangement 100 for a vehicle occupant restraint system. The airbag arrangement 100 comprises a first airbag 120 and a second airbag 140, which can be inflated to protect the vehicle occupant, for example in the event of a detected impact. The gas bags 120, 140 are shown in FIG. 1 in the inflated state. In the example shown, a vehicle occupant P is also on a seat S of the vehicle. The gas bag arrangement 100 is arranged in relation to the occupant P in such a way that the gas bags 120, 140 extend from opposite sides of the occupant P. The gas bags 120, 140 extend from opposite sides from the backrest of the vehicle seat S.

The first airbag 120 and the second airbag 140 are each shaped such that they extend at least partially along one side and in a frontal area in front of the occupant P. When the airbags are inflated, the second airbag 140 also at least partially surrounds the first airbag 120, for example in the front area in front of the occupant P. The first airbag 120 and the second airbag 140 each overlap in an overlap section 122, 142 of the first and the second Gas bags 120, 140.

The first gas bag 120 and the second gas bag 140 are in contact with one another in the region of the overlap sections 122, 142. In at least one of the overlap sections 122, 142, the gas bag arrangement 100 has connecting means that are associated with it are provided to form an adhesive bond between the first gas bag 120 and the second gas bag 140 in the region of the overlap sections 122, 142. Adhesive is, for example, attached to at least one of the overlap sections 122, 142 as a connecting means. In further examples, the airbag arrangement 100 comprises one or more Velcro fasteners for the adhesive connection of the overlap sections 122, 142.

In the inflated state of the airbags 120, 140, the airbag arrangement 100 effects a U-shaped enclosure of the vehicle occupant P. In this way, the airbag arrangement 100 allows effective absorption of impact forces from different directions, which can act on the occupant P from the outside. In addition, the airbag arrangement 100 allows the occupant P to be restrained in a variety of directions in the event of an impact. The adhesive connection between the overlapping section 122 of the first gas bag 120 and the overlapping section 142 of the second gas bag 140 thereby ensures that the occupant P is effectively prevented from breaking through by the U-shaped enclosure, for example when the upper body rushes forward. For this purpose, a size of the overlap sections 122, 142 is selected, for example, in accordance with an adhesive strength of the selected connecting means and an expected required retention force.

In the inflated state, the first airbag 120 has a volume that is greater than the volume of the second airbag 140. In some examples, the first airbag 120 is designed such that a cross section, in particular a vertical extension, of the first airbag 120 starts from a lateral supply section 128 (laterally from the occupant P) is enlarged (preferably by more than half) such that the first airbag 120 extends in a frontal section 129 in front of the occupant P over at least one head and thorax region of the occupant P. In contrast, the second gas bag 140 is designed, for example, such that, starting from a lateral supply section 148 (to the side of the occupant P), it extends in the frontal section 149 only over the thoracic region and its cross section, in particular its vertical extension, does not therefore extend relative to the lateral supply section 148 or only slightly enlarged (preferably by less than a quarter). The lateral feed sections 128, 148 have a relatively small cross-section in the vertical extent, which is used primarily to feed the gases released by an inflator into the sections 129, 149 of the gas bags 120, 140 extending in the frontal area. With a corresponding design, the lateral feed sections 128, 148 can also have a protective effect in the event of a side impact or an oblique impact. In some examples, in the event of a frontal impact, the first airbag 120 arranged closer to the occupant P functions primarily to absorb an impact of the occupant, in particular in the head and thorax areas. In contrast, in this case the second gas bag 140 is primarily intended, for example, to secure the enclosure of the occupant P by the gas bag arrangement 100 and, in some examples, to support the first gas bag 120 and / or to provide additional impact absorption. In order to absorb the impact of the occupant in the head region, the first airbag 120 can have lateral wings which, as intended, extend to the left and right of the occupant's head and are arranged on the frontal section 129.

To provide the gas bag arrangement 100 in a vehicle, the gas bags 120, 140 can be attached in the folded state, for example, on opposite sides of a backrest of a seat S. Alternatively, the gas bags 120, 140 can be attached to opposite structures of the vehicle, in each case adjacent to the opposite sides of the backrest, in the folded state.

To form the U-shaped enclosure of the occupant P shown in FIG. 1 by means of the gas bag arrangement 100, it is advantageous to inflate the gas bags 120, 140 at different times from one another. In some examples, when the gas bag arrangement 100 is triggered, the first gas bag 120 is therefore first inflated. For this purpose, the second gas bag 140 is inflated with a time delay, which for example wraps around the inflated first gas bag 120 from the outside in order to surround it at least in the region of the overlap sections 122, 142, and which has an adhesive connection to the first gas bag 120 by means of connecting means forms. Such a time-delayed inflation of the gas bags 120, 140 has the advantage that the first gas bag 120 quickly provides protection in the entire frontal area of the occupant P, for example in the case of forces acting from outside. It is also avoidable that the inflation of the first gas bag 120 is hindered by parts of the second gas bag 140. In addition, the correct application of the second gas bag 140 to the first gas bag 120 is favored. At the same time, the smaller volume of the second gas bag 140 compared to the first gas bag 120 allows the second gas bag 140 to be inflated rapidly in order to form a secure enclosure for the occupant P.

FIGS. 2A to 2D show schematic representations of various stages when the airbag arrangement 100 from FIG. 1 is triggered. FIG. 2A shows a state before or including when the airbag arrangement is triggered (not shown). The gas bags of the gas bag arrangement are in a folded state and are in each case on opposite sides of a backrest of the seat S or on adjacent ones Structures of a vehicle in which the seat S is located. The seat S is, for example, a driver's seat of the vehicle, which is oriented in the direction of travel.

FIG. 2B shows a state after the gas bag arrangement has been triggered. As described in connection with FIG. 1, the first gas bag 120 was first inflated. The overlap section 122 of the first gas bag 120 is located on an outward-facing surface of the gas bag 120 in front of the occupant P.

FIG. 2C shows a further stage of the triggering process of the airbag arrangement 100. The second airbag 140 is now also inflated, with a time delay to the first airbag 120. The overlap section 142 of the second gas bag 140 arranged on an inner surface of the second gas bag 140 has in this case also applied to the outward-facing overlap section 122 of the first gas bag 120 and forms an adhesive connection with it by one or more connecting means. The position of gas bag arrangement 100 and occupant P shown in FIG. 2C corresponds to that from FIG. 1.

Figure 2D shows a subsequent stage. In this case, a head and thorax region of the occupant P is moved in the direction of the airbag arrangement 100, as can occur, for example, as a result of the forward displacement of the occupant P in the event of a frontal impact, the previous detection of which caused the airbag arrangement 100 to be triggered. In this case, the airbag arrangement 100 catches the premature body of the occupant P. For energy absorption, in some examples the first and / or the second gas bag 120, 140 has an outflow opening for throttled outflow of gas from the respective gas bag 120, 140. In further examples, the first and / or the second airbag 120, 140 are attached to the seat S or a structure of the vehicle for energy absorption via deformation elements.

FIG. 3 (also in FIG. 6) shows an airbag arrangement 100 arranged on a vehicle seat S of a vehicle F according to a further embodiment of the invention. The first and the second airbag 120, 140 each have a frontal section 129, 149 which extends in front of the vehicle occupant P, the frontal section 129, 149 each being formed by a frontal chamber 1290, 1490. The frontal chambers 1290, 1490 each adjoin a lateral supply section 128, 148 of the first and second gas bags 120, 140. The lateral feed sections 128, 148 each have a plurality of chambers 1280, 1480, each of which extends in an elongated, in particular tube-like, manner in the vertical direction, ie along the vehicle height direction or the longitudinal direction of the seat. In Figure 3, the chambers 1280, 1480 are each shown in a cross section parallel to a horizontal plane. The chambers 1280, 1480 are each in flow communication with one another (for example via passage openings, not shown).

The respective front of the side chambers 1280, 1480 is arranged adjacent to the front chamber 1290, 1490 of the respective gas bag 120, 140; for example, it borders on the frontal chamber 1290, 1490. However, the frontal chambers 1290, 1490 are formed separately and are each separated from the front of the chambers 1280, 1480 by a wall. However, there is also a flow connection between the front chambers 1290, 1490 and the respective front chamber 1280, 1480; for example via a passage opening (overflow opening) in the wall or a passage area adjacent to the wall.

The chambers 1280, 1480 of the lateral feed sections 128, 148 and the front chambers 1290, 1490 are arranged and connected to one another in such a way that the gas bags 120, 140 - viewed in a horizontal plane - in each case at least in the region of the front chambers 1290, 1490 and the lateral feed sections 128, 148 have a curved course or the frontal sections 129, 149 and the lateral feed sections 128, 148 are oriented at an angle to one another. The frontal chambers 1290, 1490 overlap one another in the corresponding overlap section 122, 142, in which a connecting means is also provided on the mutually facing outer sides of the frontal chambers 1290, 1490.

In order to achieve a curved shape of the lateral sections 128, 148, the outer side of the gas bag (the side facing away from the occupant P) has a longer developed fabric length than the inner side of the gas bag (the side facing the occupant P). The gas bag 120, 140 can thus lie against the occupant P in the inflated state, forming a curve.

FIG. 4 relates to a further embodiment of the gas bag arrangement 100. The frontal section 129, 149 and the lateral feed section 128, 148 are each in flow connection with one another via a curvature 1001, 1002 of the gas bag 120, 140 and are formed by a single gas bag chamber. The frontal section 129, 149 and the lateral feed section 128, 148 each run at an angle to one another. The curvature 1001, 1002 has, in particular, a cross section which is reduced in comparison with the frontal section 129, 149 and the lateral feed section 128, 148 (parallel to a horizontal plane (ie a constricted kink). The frontal section 129, 149 and the lateral feed section 128, 148 are however, not separated from one another by a wall, as in Figure 3. In addition, means, for example in the form of tether straps arranged on the inside, can also be provided for producing the narrowed kink point. In Figure 4, the frontal section 129, 149 and the lateral section The feed section 128, 148 is formed by a common chamber, but it is also conceivable that the frontal section 129, 149 and the lateral feed section 128, 148 are each formed by separate chambers, which are, however, connected to one another via the curvature. The lateral supply section 128, 148 could also pass through at least one of the gas bags 120, 140 s include several chambers in the manner of FIG.

In order to stabilize the position of the frontal section 129, 149 and the lateral supply section 128, 148 relative to one another, FIG. 4 provides external tether straps 51, 52, each of the frontal section 129, 149 of an airbag 120, 140 with the lateral supply section 128, 148 thereof Connect gas bags 120, 140.

Such tether 51, 52 can also be used in the embodiment of Figure 3. This configuration is then shown in FIG. 14. There are additional tether straps 53, 54, each of which connects the lateral feed section 128, 148 to a component of the vehicle seat S (for example, a backrest). The tether 51, 52 serve to stabilize the gas bags 120, 140 in itself. The tether straps 53, 54 serve to stabilize the gas bags 120, 140 with respect to the vehicle seat S.

Alternatively (or also additionally), at least one tether 61, 62 can also extend inside the front chamber 1290 of the first gas bag 120 in order to produce an indentation 1292 in a side 1291 of the front chamber 1290 facing the vehicle occupant P. This configuration is shown in FIG. 13. With the aid of the indentation 1292, the contour of the gas bag 120 can be adapted to the shape of the vehicle occupant P, so that the gas bag lies more closely. An earlier restraint of the occupant and a better connection between the gas bags can thus be achieved. The tether straps 61, 62 in particular each extend from a side 1293 facing away from the vehicle occupant P to the side 1291 of the front chamber 1290 facing the vehicle occupant P, one end in each case the tether 61, 62 is fixed on these sides of the front chamber 1290. It is also conceivable that analogously, the front chamber 1490 of the second gas bag 140 also has at least one such tether.

The gas bags 120, 140 of the embodiment from FIG. 1 can also be equipped with tether 61, 62 inside the frontal chambers 1290, 1490. The tether 61, 62 in the interior of the first gas bag 120 extend predominantly vertically (along the longitudinal direction of the seat) and the tether 61, 62 in the interior of the second gas bag 140 predominantly horizontally (along the seat width direction), as in FIG Airbag arrangement from Figure 1 is shown schematically.

Instead of tether straps, the gas bags 120, 140 can also be bent, as shown in FIG. 4, by appropriately cutting the material layers that are used to form the gas bags 120, 140. FIG. 5B shows the corresponding material layers for the first and second gas bags 120, 140 in the non-inflated, merely superimposed state. The outer material layer 122, 142 has a fold 123, 143, so that the outer material layer 122, 142 is longer than the inner material layer 121, 141. The shortening of the inner material layer 121, 141 compared to the outer material layer 122, 142 ensures that the gas bag 120, 140 is bent in the inflated state in the region of the fold 123, 143. The inflated state is shown in FIG. 5A. Instead of an extension of one layer of material compared to the other layer of material by means of a fold, darts in the other layer of material can be provided to shorten the other layer of material compared to the one layer of material. The fold or darts are to be placed in such a way that the airbag kinks at the desired location and in the desired direction when inflated.

According to the embodiment from FIG. 7 (side view of the first gas bag 120), the lateral section 128 of the first gas bag 120 can comprise three substantially vertically extended and elongated gas bag chambers 1280, which are arranged in a plane transverse to the seat width direction. A first gas bag chamber 1280a (rearmost from the occupant's perspective) extends over the pelvic and thoracic region of the occupant. A second and a third gas bag chamber 1280b, 1280c each extend over the head and thorax area of the occupant. The second airbag 140 can also have such a combination of airbag chambers. The front chamber 1290 of the first gas bag 120 extends over the head and thorax area of the occupant. Deviating from this, the front chamber 1490 of the second gas bag extends only over the thorax area of the occupant P. The number of pelvic-thorax chambers and the head-thorax chambers can generally differ from the number shown in FIG. 7. According to FIG. 8 (side view of the second gas bag 140), four side chambers 1480a-1480d can be provided, at least one of the side chambers 1480a-d of the side supply section 148 of the second gas bag 140 being designed such that it inflates the pelvis -, Thorax- and head area of the vehicle occupant P at least partially covers (chambers 1480b, 1480c). Analogously or alternatively, the lateral supply section 128 of the first gas bag 120 can be designed. With such a configuration of the lateral feed section 128, 148, additional protection can be provided in the event of a side impact, in particular a nearside or farside impact (impact on the vehicle side facing or facing away from the vehicle occupant). It is also possible that in addition to the lateral chamber 1480b, 1480c, which extends from the pelvic area to the head area of the vehicle occupant P, there is at least one chamber which essentially serves only to protect the pelvic area (chamber 1480a). It is also conceivable that part of the lateral chambers 1480b, 1480c, 1480d only cover the head and thorax area, while another part of the lateral chambers 1480a only extends over the thorax area (FIG. 9, side view of the second gas bag 140).

In the embodiments of FIGS. 7 to 9, the lateral section 128, 148 extends from one side of the backrest of the vehicle seat S.

Another embodiment is shown in FIG. 12. Here, the lateral chambers 1280a, 1280b and 1280c of the lateral section 128 of the first gas bag 120 are shown. The first chamber 1280a, which extends from one side of the headrest K of the vehicle seat S, extends over the head region of the occupant P, as do the subsequent lateral chambers 1280b 1280c and the frontal chamber 1290, which also extend over the shoulder region of the occupant P. It is advantageous here that the occupant's arms can hardly hinder the spreading of the gas bag.

In the embodiment from FIG. 10, the first airbag 120 extends from the armrest A of the vehicle seat S. The first airbag 120 here comprises a lateral chamber 1280 and a frontal chamber 1290, which here covers the thoracic region and the lower head region by way of example. The second airbag 140 can also have such a combination of airbag chambers. The lateral chamber 1280 is arranged approximately at the same distance from the backrest as the front chamber 1290, so that the chambers here have no curvature. The airbag can rest in the armrest be stowed away, while a gas generator can also be installed in another way, for example in the backrest.

Figure 1 1 shows an embodiment in which the first airbag 120 is arranged in the seat F of the vehicle seat S and protrudes laterally from the seat F in the inflated state. In this embodiment too, the lateral chamber 1280 is located approximately at the same distance from the backrest as the front chamber 1290, so that the chambers 1280, 1290 have no curvature here. It is conceivable that the first and second gas bags 120, 140 are designed in this way.

FIGS. 16 to 19 show ways in which an occupant can free himself from the inflated gas bags 120, 140 after an accident. An arrow is shown in FIG. 16, which indicates that the airbag arrangement 100 can be pushed up over the head of the occupant. In FIG. 17, the first (and second) airbag 120 comprises a tear line R, for example outside the interior enclosed by the airbag chamber. The occupant can separate the gas bag attached to the vehicle seat S from the vehicle seat S by tearing the tear line R. As already mentioned, in one embodiment a connecting means 130 is provided which connects the overlap section 122 of the first gas bag 120 and the overlap section 142 of the second gas bag 140 to one another. In the embodiment of Figures 18 and 19, the connecting means is formed by a Velcro fastener. FIG. 19 is an enlargement of a detail from FIG. 18, which shows the overlap sections 122, 142 and the connecting means 130. The Velcro fastener 130 is designed in such a way that the shear force is low when the two overlap sections 122, 142 are moved apart along a predetermined direction (so that they are easy to separate from one another), and that the shear force is large during a movement that not in the predetermined direction (so that they are difficult or impossible to separate). According to one embodiment, the Velcro fastener is designed such that the Velcro side is arranged on the outside (side facing away from the occupant) of the frontal section 129 of the first gas bag 120 and the fleece side is arranged on the inside (side facing the occupant) of the frontal section 149 of the second gas bag 140 is arranged, the second airbag 140 partially enclosing the first airbag 120. Injuries to the occupant from contact with the Velcro side can thus be avoided.

Another embodiment provides that when the gas bags 120, 140 are unfolded, the arms of the vehicle occupant (as indicated by the arrow in FIG. 20) are pressed down. For this purpose, the lateral chambers 1280b, 1280c of the first gas bag (and analogously, the corresponding lateral chambers of the second gas bag) have to be specially folded and / or to unfold around the x-axis in relation to the vehicle occupant.

According to a further embodiment, the airbag arrangement 100 comprises a first and a second airbag 120, 140, which are each formed by an airbag chamber 1270, 1470 which is C-shaped when inflated (FIG. 21). The C-shaped gas bag chambers 1270, 1470 extend laterally next to the occupant's head (on opposite sides of the head) and in front of the occupant's chest. For stabilization, the gas bags 120 140 are connected behind the head of the occupant to a tether 71 and each tied to the vehicle seat S with a tether 72. The tether 72 extends at the lower end of the head area of the vehicle occupant. Additionally or alternatively, a (further) tether can be provided, which extends from the airbag 120, 140 to the vehicle seat S at the upper end of the head region of the vehicle occupant. An overlap section 122, 142, in which the first and second airbags 120, 140 overlap, extends in front of the chest area of the vehicle occupant. A connecting means 130, for example a Velcro fastener, is provided in the overlap section 122, 142, in order to hold the first airbag 120 against the second airbag in the inflated state and to close the airbags 120, 140 in front of the vehicle occupant's chest.

In the embodiment from FIG. 22, the first airbag 120 comprises, in addition to the egg-shaped chamber 1270, a frontal chamber 1290 which is fluidly connected to the C-shaped chamber 1270. The front chamber 1290 has a smaller volume than the C-shaped chamber 1270, so that the front chamber 1290 can be regarded as a secondary chamber and the C-shaped chamber as the main chamber. The front chamber 1290 extends in the direction of the C-shaped chamber 1470 of the second gas bag 140 and overlaps with it. The front chamber 1290 thus forms the overlap section 122 of the first gas bag 120 in sections. In the overlap sections 122, 142 of the first and second gas bags 120, 140, connecting means are formed in order to fasten the first gas bag 120 to the second gas bag 140. The auxiliary chamber or front chamber 1290 of the first gas bag 120 extends in the inflated state of the gas bags 120, 140 in front of the chest area of the occupant sitting on the vehicle seat.

Another embodiment is shown in FIG. This gas bag arrangement 100 comprises a first and a second gas bag 120, 140. In FIG. 23, the gas bags are arranged on opposite sides of the backrest of a vehicle seat S. The gas bags 120, 140 each have a shell shape in the inflated state, each for receiving a shoulder of an intended on the vehicle seat seated vehicle occupant is trained. To form the shell shape, the airbag 120, 140 has a lateral section 128, 148 (extends laterally next to the shoulders), an upper section 127, 147 (extends above the shoulders) and a frontal section 129, 149 (extends in front of the Shoulders and chest). (The side section 148 and the upper section 147 of the second gas bag 140 cannot be seen in the illustration in FIG. 23, but correspond in mirror image to the side section 128 or the upper section 127 of the first gas bag 120.) The three sections are through a gas bag chamber 1260, 1460. When the gas bags 120, 140 are inflated, the frontal sections 129, 149 of the first and second gas bags 120, 140 touch each other in sections. In the contact area, connecting means 130 are provided in order to connect the first and second airbags 120, 140 to one another in front of the chest area of the vehicle occupant.

In the embodiment from FIG. 24, the first airbag 120 comprises, in addition to the bowl-shaped chamber 1260, a frontal chamber 1290 which is fluidly connected to the bowl-shaped chamber 1260 and which is arranged on the frontal section 129. The bowl-shaped chamber 1260 can be referred to as the main chamber and the front chamber 1290 as the secondary chamber. The front chamber 1290 extends in the direction of the bowl-shaped chamber 1460 (in particular the frontal section 149) of the second gas bag 140 and partially overlaps with the frontal section 149 of the bowl-shaped chamber 1460. The frontal chamber 1290 thus forms the overlap section 122 of the first gas bag 120 in sections The overlapping sections 122, 142 of the first and second gas bags 120, 140, respectively, are designed to connect the first gas bag 120 to the second gas bag 140. The auxiliary chamber or front chamber 1290 of the first gas bag 120 extends in the inflated state of the gas bags 120, 140 in front of the chest area of the occupant sitting on the vehicle seat.

The embodiment from FIG. 25 differs from that from FIG. 24 in particular in that the first and second airbags 120, 140 each have an additional secondary chamber 1250, 1450, which is fluidly connected to the corresponding bowl-shaped chamber 1260, 1460 and in each case on the frontal section 129, 149 is arranged. The additional secondary chamber 1250, 1450 extends in particular in front of the head area of the occupant.

The embodiment from FIG. 26 differs from that from FIG. 24 in particular in that the front chamber 1290 of the first gas bag 120 extends in front of the head region of the occupant sitting on the vehicle seat.

Claims

1. Airbag arrangement (100) for a seat-based vehicle occupant restraint system, with at least a first and a second airbag (120, 140) inflatable to protect a vehicle occupant (P), the at least one first and second airbag (120, 140) each on a vehicle seat (S) is to be arranged, wherein

in the inflated state of the gas bags (120, 140), an overlap section (122) of the first gas bag (120) overlaps with an overlap section (142) of the second gas bag (140).

2. Airbag arrangement (100) according to claim 1, characterized in that the first airbag (120) and the second airbag (140) each have a frontal section (129, 149) which is in the inflated state of the airbags (120, 140) extends in a plane parallel to the seat width direction and to the seat longitudinal direction, and have a lateral section (128, 148) which, in the inflated state of the gas bags (120, 140), extends in a plane transverse to the seat width direction.

3. Airbag arrangement (100) according to claim 1 or 2, characterized in that the first and / or the second airbag (120, 140) comprises at least two airbag chambers (1280, 1480, 1290, 1490) which are fluidly connected to one another.

4. The gas bag arrangement (100) according to claim 3, characterized in that the first and / or the second gas bag (120, 140) comprises a main chamber and a secondary chamber, the secondary chamber being fluidly connected to the main chamber of the first and second gas bags and wherein the secondary chamber, when inflated, has a smaller volume than the main chamber.

5. The gas bag arrangement (100) according to claim 3 or 4, characterized in that the at least two gas bag chambers (1280, 1480) are each designed as substantially vertically oriented tubes (1280a, 1280b, 1280c, 1280d, 1480a, 1480b, 1480c, 1480d) are.

6. Airbag arrangement (100) according to one of claims 3 to 5, characterized in that the at least two airbag chambers (1280, 1480, 1290, 1490) in the inflated state and in a horizontal cross-sectional plane are arranged in succession in a row, the at least two gas bag chambers (1280, 1480, 1290, 1490) are in particular arranged and fastened to one another in such a way that the at least two gas bag chambers (1280, 1480, 1290, 1490) in the inflated state, viewed in a horizontal cross-sectional plane, extend along a curve (1001, 1002).

7. Airbag arrangement (100) according to one of claims 3 to 6, characterized in that two adjacent ones of the at least two airbag chambers (1280, 1480, 1290, 1490) are fluidly connected to one another via an overflow opening.

8. The gas bag arrangement (100) according to claim 7, characterized in that one of the at least two gas bag chambers (1280, 1480) has an inflow opening via which gas from a gas generator can be introduced into the gas bag, the inlet opening being designed with respect to the overflow opening of this gas bag chamber that gas generated by the gas generator flows successively from the gas generator into the at least two gas bag chambers (1280, 1480, 1290, 1490), the size of the overflow opening between two adjacent gas bag chambers (1280, 1480, 1290, 1490) being dimensioned in each case that the maximum fill level of that of the two adjacent gas bag chambers (1280, 1480, 1290, 1490) that is closer to the gas generator is reached before the maximum fill level of the other of the two adjacent gas bag chambers (1280, 1480, 1290, 1490) is reached.

9. Airbag arrangement (100) according to one of the preceding claims, characterized in that, when inflated in a horizontal cross-sectional plane, the first or second airbag (120, 140) between two adjacent airbag chambers (1280, 1480, 1290, 1490) has a smaller cross-section has than the adjacent gas bag chambers (1280, 1480, 1290, 1490), the first or second gas bag (120, 140) forming a desired kink (1001, 1002) in the region of the smaller cross section.

10. The airbag arrangement (100) according to one of claims 3 to 9, characterized in that in the state of the airbag arrangement (100) which is arranged as intended on a vehicle seat (S) and in the inflated state of the first or second airbag, there is at least one airbag chamber (1280a, 1280b , 1280c, 1280d, 1480a, 1480b, 1480c, 1480d) extends in the vertical direction into the head region and / or the pelvic region of the vehicle occupant (P) sitting on the vehicle seat (S).

11. Airbag arrangement (100) according to one of the preceding claims, characterized in that in the intended on a vehicle seat (S) arranged State of the gas bag arrangement (100) and in the inflated state of the first or second gas bag (120, 140) the frontal section (129, 149) is concavely curved.

12. Airbag arrangement (100) according to one of the preceding claims, characterized in that the overlap sections (122, 142) are in the inflated state of the gas bags (120, 140) in front of the vehicle occupant (S) and overlap.

13. Airbag arrangement (100) according to one of the preceding claims, characterized in that in the inflated state of the airbags (120, 140)

Overlap sections (122, 142) are in mechanical contact with one another, and in particular can be connected to one another via connecting means (130) and are connected to one another in the inflated state of the gas bags (120, 140), in particular the overlap sections (122, 142) in the inflated state of the gas bags (120, 140) at least partially stick together.

14. Airbag arrangement (100) according to claim 13, characterized in that the connecting means (130) can be separated from one another (only) along a predetermined direction by moving the connecting means (130).

15. Airbag arrangement (100) according to one of claims 3 to 14, characterized in that tether (51, 52, 53, 54, 61, 62) for shaping the

Gas bag chambers (1280, 1480, 1290, 1490) in the inflated state of the gas bags (120, 140), to stabilize the relative arrangement of the gas bag chambers (1280, 1480, 1290, 1490) to one another and / or to stabilize the relative arrangement of the gas bags (120 , 140) are provided in the inflated state of the gas bags (120, 140) for a reference, in particular a vehicle seat (S).

16. The gas bag arrangement (100) according to claim 1, characterized in that when the gas bag arrangement (100) is arranged as intended on a vehicle seat (S) and when the first and second gas bags (120, 140) are inflated, the first gas bag (120) and the second airbag (140) extends on opposite sides next to the head area and in front of the chest area of the occupant (P) seated on the vehicle seat (S), the overlap sections (122, 142) extending in front of the chest area.

17. The gas bag arrangement (100) according to claim 16, characterized in that the first and the second gas bag (120, 140) each have a main chamber (1270, 1470) The main chamber (1270, 1470) extends laterally next to the head region and in front of the chest region of the occupant (P) sitting on the vehicle seat (S), and in that the first and / or the second airbag (120) has a secondary chamber (1290 ), which is fluidly connected to the main chamber (1270) of the first or second gas bag (120), the secondary chamber (1290) in the inflated state of the gas bags (120, 140) with the main chamber (1470), with which it is not fluid is connected, overlaps and in particular is connected to this main chamber (1470) by a connecting means (130).

18. Airbag arrangement (100) according to claim 17, characterized in that the secondary chamber (1290) extends in the inflated state of the gas bags (120, 140) in front of the chest area or in front of the head area of the occupant (P) sitting on the vehicle seat (S) .

19. Airbag arrangement (100) according to one of claims 16 to 18, characterized in that the first and the second airbag (120) are connected to one another via a tether (71), the tether (71) being in the intended manner on a vehicle seat ( S) arranged state of the airbag arrangement (100) extends in particular behind the head region of the occupant (P) sitting on the vehicle seat (S).

20. Airbag arrangement (100) according to one of claims 16 to 19, characterized in that the first and the second airbag (120, 140) in the

Section corresponding to the head region has fastening means (72) for fastening to the vehicle seat (S), in particular a fastening means being provided at the upper end of this section.

21. Airbag arrangement (100) for a seat-based vehicle occupant restraint system, with at least a first and a second airbag (120, 140) which is inflatable to protect a vehicle occupant, the at least one first and second airbag (120, 140) in each case on a vehicle seat ( S) is to be arranged, the first and the second airbag (120, 140) each having a shell shape in the inflated state, which is each designed to receive a shoulder of a vehicle occupant (P) seated as intended on the vehicle seat (S), the first and the second airbag (120, 140) each has a lateral section (128, 148) which extends in a plane transverse to the seat width direction, an upper section (127, 147) which extends in a plane transverse to the seat longitudinal direction, and one frontal portion (129, 149), which extends in a plane transverse to the side portion (128, 148) and transverse to the upper portion (127, 147), which together the Form bowl shape.

22. The gas bag arrangement (100) according to claim 21, characterized in that in the inflated state of the gas bags (120, 140) the frontal sections (129, 149) of the first and second gas bags (120, 140) touch or overlap in sections, whereby a connection between the first and the second gas bag (120, 140) can be established.

23. The gas bag arrangement (100) according to claim 21 or 22, characterized in that the first and the second gas bag (120, 140) each comprise a main chamber (1260, 1460), each main chamber (1260, 1460) forming the shell shape, and that the first and / or the second gas bag comprises a secondary chamber (1290) which is fluidly connected to the main chamber (1260) of the first and second gas bags (120).

24. Airbag arrangement (100) according to claim 23, characterized in that the secondary chamber (1290) in the inflated state of the gas bags (120, 140) overlaps with the main chamber (1460), with which it is not fluidly connected, and in particular with this main chamber (1460) is connected by a connecting means (130).

25. Airbag arrangement (100) according to claim 23 or 24, characterized in that the secondary chamber (1290) in the inflated state of the airbags (120, 140) in front of the chest area or in front of the head area of the occupant sitting on the vehicle seat (S) (P ) extends.

26. Airbag arrangement (100) according to one of claims 23 to 25, characterized in that the secondary chamber (1290) is arranged on the frontal section (129) of the corresponding main chamber (1260).

27. Vehicle occupant restraint system with a gas bag arrangement (100) according to one of the preceding claims, characterized by at least one inflator for filling the first and second gas bags (120, 140) with a gas, the vehicle occupant restraint system being designed to carry out the first and to fill the second gas bag (120, 140) with gas at different times.

28. Vehicle seat (S) with a gas bag arrangement (100) according to one of claims 1 to 26, characterized in that the gas bags (120) are at least partially opposite one another in the seat width direction in the folded state, the gas bags (120, 140) in the folded state for example, in opposite side sections of a backrest, a seat (F) or a headrest (K) of the Vehicle seat (S) or in opposite armrests (A) of the vehicle seat (S) are arranged.

29. Vehicle seat (S) according to claim 28, characterized in that the gas bags (120, 140) are detachably attached to the vehicle seat (S), so that they according to a

Tripping case can be separated from the vehicle seat (S).