WO2021121737A1 - Ensemble airbag pour un système de retenue d'occupant de véhicule - Google Patents

Ensemble airbag pour un système de retenue d'occupant de véhicule Download PDF

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Publication number
WO2021121737A1
WO2021121737A1 PCT/EP2020/079780 EP2020079780W WO2021121737A1 WO 2021121737 A1 WO2021121737 A1 WO 2021121737A1 EP 2020079780 W EP2020079780 W EP 2020079780W WO 2021121737 A1 WO2021121737 A1 WO 2021121737A1
Authority
WO
WIPO (PCT)
Prior art keywords
airbag
gas bag
fixing
connecting element
arrangement
Prior art date
Application number
PCT/EP2020/079780
Other languages
German (de)
English (en)
Inventor
Tobias Pausch
Simon Höfer
Mingxi Yan
Tobias POLZIN
Original Assignee
Joyson Safety Systems Germany Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joyson Safety Systems Germany Gmbh filed Critical Joyson Safety Systems Germany Gmbh
Priority to CN202080085074.3A priority Critical patent/CN115151452A/zh
Priority to DE112020006169.8T priority patent/DE112020006169A5/de
Publication of WO2021121737A1 publication Critical patent/WO2021121737A1/fr

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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
    • 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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R2021/23107—Inflatable members characterised by their shape, construction or spatial configuration the bag being integrated in a multi-bag system
    • 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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
    • B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
    • 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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23386—External tether means

Definitions

  • the invention relates to a gas bag arrangement for a vehicle occupant restraint system. It also relates to a vehicle seat which includes such a gas bag arrangement.
  • the gas bag arrangement according to the invention is provided in particular for a seat-based vehicle occupant restraint system.
  • a gas bag arrangement for a seat-based vehicle occupant restraint system can comprise two gas bags, which in the inflated state each extend laterally next to the head, above the shoulders and in front of the chest area of the vehicle occupant seated as intended on the vehicle seat.
  • the problem on which the invention is based is to create an airbag arrangement for a vehicle occupant restraint system with a plurality of airbags that can be reliably connected to one another.
  • the gas bag arrangement comprises at least one first and at least one second gas bag which can be inflated to protect a vehicle occupant.
  • the first and second gas bags are each provided to be arranged on a vehicle seat, for example on a backrest, a seat surface or a headrest of the vehicle seat or in mutually opposite armrests of the vehicle seat.
  • the first and the second gas bag can be provided here to protect the head and the chest area of the vehicle occupant who is intended to be on the vehicle seat.
  • the first airbag and the second airbag can extend on opposite sides of the head area and in front of the chest area of the occupant seated as intended on the vehicle seat.
  • the first and the second gas bag each have at least one first fixing area.
  • the number of first fixing areas can be any number.
  • the first fixing area of the first airbag and the first fixing area of the second airbag can be connected to one another and are used in particular to prefix the first and second airbag to one another.
  • the pre-fixing can be formed when the two airbags come into contact with one another for the first time and can prevent the airbags from ricocheting from one another.
  • the two airbags are pre-fixed by the first fixing areas in particular only during or at the end of the inflation process (unfolding process) of the airbags in that the first airbag and the second airbag approach or contact one another.
  • first fixing areas For the purpose of pre-fixing the first and second gas bags to one another and the first fixing area of the first airbag and the first fixing area of the second airbag on the first and second airbag, in particular, can be arranged in such a way that the first fixing areas move towards one another during the inflation process of the two airbags.
  • the first fixing area of the first airbag and the first fixing area of the second airbag can be formed on an inner side of the first and second airbag, respectively.
  • an inside is to be understood as the side of the gas bag which, as intended, faces the vehicle occupant.
  • the first fixing areas can extend in front of the chest area of the vehicle occupant who is intended to be on the vehicle seat.
  • the airbag arrangement comprises at least one connecting element, via which an additional connection of the two airbags to one another can be formed.
  • the additional connection is to be understood as being additional to the connection that can be formed between the two first fixing areas.
  • the at least one connecting element can be arranged on one of the two gas bags and be provided to form a connection with the other of the two gas bags.
  • first the connection of the two airbags can be formed via the first fixing area of the first airbag and the first fixing area of the second airbag and then the additional connection of the two airbags by means of the connecting element.
  • the connection via the first fixing areas can thus serve to prefix the gas bags to one another.
  • the pre-fixing can already be formed before the two gas bags are completely unfolded.
  • the pre-fixing can serve, for example, to maintain a certain relative arrangement of the two gas bags in the further course of the deployment process. This specific relative arrangement can be a prerequisite for the successful formation of the additional connection.
  • a completely connected state of the gas bags can be achieved by means of the additional connection. In the completely connected state of the gas bags, the gas bag arrangement is designed, for example, to catch the vehicle occupant to be protected who is displaced forward in the direction of the gas bag arrangement as a result of an accident.
  • the connecting element can extend in front of a chest area of the vehicle occupant. Furthermore, in the (completely) interconnected state of the two gas bags, a section of at least one of the gas bags can extend in front of a chest area of the vehicle occupant.
  • the connecting element is inflatable.
  • the connecting element can thus be designed as an airbag chamber or comprise an airbag chamber.
  • This airbag chamber can be a secondary chamber of the first airbag which is in flow connection with a main chamber of the first airbag.
  • the main chamber (together with the second airbag) can in particular serve to catch the vehicle occupant in an accident situation.
  • the secondary chamber which is deformed and displaced during the inflation process of the gas bags, can serve the purpose of displacing the connecting element in the course of the inflation process of the gas bags, in particular in the direction of the second gas bag.
  • the secondary chamber can be formed on a side of the main chamber facing away from the vehicle occupant.
  • the connecting element comprises a non-inflatable fabric layer or the connecting element is formed by such a fabric layer.
  • the fabric layer is attached to the first airbag.
  • the fastening of the fabric layer on the first airbag can be realized via a releasable connection and a non-releasable connection.
  • the connecting element can move at least in sections (freely) with respect to the first airbag, while the connecting element is still fixed to the first airbag via the non-releasable connection.
  • the releasable connection described in connection with the non-inflatable fabric layer can also serve to temporarily fix the inflatable connecting element.
  • the secondary chamber can be temporarily fixed to the main chamber by means of a releasable connection.
  • a connection is to be regarded as a detachable connection, which fails or loosens under certain conditions (external influence).
  • the detachable connection can be such that it is destroyed by the detachment.
  • the releasable connection can be designed as a tear seam or a stitched seam.
  • the releasable connection can be designed as a non-destructive connection.
  • Such a releasable connection can be designed, for example, as a Velcro connection or as a magnetic connection with a comparatively low holding force.
  • a releasable connection can also be designed in such a way that before or at the start of the deployment process the connecting element is only partially arranged in a folded state on the first airbag without a mechanical connection, apart from the non-releasable connection.
  • the releasable connection can fix the folded state of the connecting element without connecting the connecting element to the first airbag.
  • the releasable connection is preferably designed in such a way that it fails or loosens in that the first airbag and the second airbag collide with one another in the inflated state or consequently rebound from one another again.
  • the releasable connection can be designed in such a way that it fails or loosens in that the envelope of the at least one first gas bag is tightened during the inflation process by the increasing internal pressure in the interior of the gas bag.
  • the detachable connection can temporarily fix a fold formed in the casing, which fold is smoothed out by the increasing internal pressure and the failure of the detachable connection.
  • the non-releasable connection is preferably designed in such a way that it does not fail or come loose under the aforementioned circumstances.
  • the releasable connection and the non-releasable connection can be formed at a distance from one another.
  • the releasable and the non-releasable connection can be arranged to one another in such a way that the non-releasable connection, which is permanently formed between the connecting element and the first gas bag, after the releasing of the releasable connection, which is only initially formed between the connecting element and the first airbag is, a movement of the connecting element relative to the first airbag (in particular in the direction of the second airbag) is not hindered.
  • the releasable connection can only be released after the first and second gas bags have been pre-fixed via their first fixing areas.
  • the non-releasable connection can be formed closer to the vehicle occupant seated on the vehicle seat as intended than the releasable connection when the gas bag arrangement is properly arranged on a vehicle seat.
  • the releasable connection can be formed on an outer side of the first airbag that is intended to face away from the vehicle occupant.
  • the connecting element can rotate about the non-releasable connection and execute a pivoting movement in the direction of the second gas bag.
  • the mass distribution within the connecting element can be designed accordingly.
  • an accumulation of mass can be provided in the outer pivotable area of the connecting element, that is, in the area of the connecting element which is opposite the area in which the non-detachable connection is formed or which is as far away from it as possible.
  • the extension of the connecting element in this area in a direction which is essentially parallel to the pivot axis of the connecting element can be greater than in the rest of the connecting element.
  • the outer pivotable area can also be designed in multiple layers (for example by the fabric layer only being turned over there (several times) and fixed with a seam), while the rest of the connecting element is designed in a single layer.
  • the connecting element can have a fixing area and the second airbag (in addition to its first fixing area) can have a second fixing area.
  • the fixing area of the connecting element and the second fixing area of the second gas bag can be connected to one another.
  • the additional connection is formed in particular when the fixing area of the connecting element is close to or touching the second fixing area of the second gas bag.
  • the connection between the fixing area of the connecting element and the second fixing area of the second gas bag can be formed by moving the connecting element, in particular the fixing area of the connecting element, in the direction of the second fixing area of the second gas bag.
  • the shape and / or orientation of the connecting element can change.
  • the connecting element In its connected state, the connecting element extends (at least in sections) between the first and the second gas bag, in particular horizontally and transversely to the direction in which the vehicle occupant is accelerated (displaced) in the context of an accident.
  • the additional connection is thus mainly subjected to shear stress. In this way, relatively large forces can be absorbed by the airbag arrangement without the additional connection between the first and the second airbag failing. The restraint effect of the airbag arrangement can be improved in this way.
  • the first fixing areas of the two airbags can form a first fixing area of the airbag arrangement
  • the fixing area of the connecting element and the second fixing area of the second airbag can form a second fixing area of the airbag arrangement.
  • the first fixing area of the airbag arrangement is spatially spaced from the second fixing area of the airbag arrangement in the inflated state of the airbag arrangement.
  • the first fixing area of the airbag arrangement is formed between the mutually facing inner sides of the first and second airbag (in the inflated state), while the second fixing area of the airbag arrangement is formed between the outer side of the second airbag and the connecting element that faces the outer side of the second airbag is.
  • a Velcro connection can be formed over the first fixing areas of the first and second gas bags.
  • the first fixing area of the first airbag can comprise a Velcro element and the first fixing area of the second airbag can comprise a fleece element, or vice versa.
  • a fleece element a velor element or a mushroom head element can be used.
  • a hook element or a mushroom head element can be used.
  • the various configurations of the first fixing areas can be combined with one another as required.
  • a magnetic connection can be formed via the first fixing areas of the first and second gas bags.
  • the first two fixing areas can each be magnetic. Since a magnetic connection alone is not necessarily protected against a (lateral) displacement of the first fixing areas relative to one another, it can be useful to combine the magnetic connection with a latching connection.
  • the first fixing area of the first airbag and the first fixing area of the second airbag can be shaped in such a way that they interlock and thus prevent a (lateral) displacement of the magnetic fixing areas relative to one another.
  • With the magnetic properties of the fixing areas it can also be achieved that the first fixing areas which approach one another during the inflation process of the gas bags also attract magnetically and thus come into contact with one another.
  • a Velcro connection can be combined with a magnetic connection.
  • a Velcro connection and / or magnetic connection (as described in connection with the first fixing areas) can also be formed over the fixing area of the connecting element and the second fixing area of the second gas bag. It is preferably provided that the first fixing area of the first airbag and the fixing area of the connecting element (which is arranged on the first airbag) or the first fixing area of the second airbag and the second fixing area of the second airbag cannot form a connection with one another. It can thus be avoided that such undesired connections are formed in the folded state of the gas bags and the individual fixing areas are no longer available for connecting the first gas bag to the second gas bag in the unfolded state.
  • a pre-fixing or an additional connection is generally understood to mean a connection which prevents the gas bags from moving away from one another.
  • the connection between the respective fixing areas can be separated from one another by moving the fixing areas relative to one another (only) along a predetermined direction.
  • the fixing areas, which are provided for connecting the first and second gas bags can, according to one embodiment, each have a flat design.
  • the gas bag arrangement forms a vehicle occupant restraint system.
  • the at least one The gas generator is designed to fill the first airbag and the second airbag with a gas.
  • the at least one gas generator is preferably provided in order to fill the two gas bags at the same time and with the same volume flow.
  • the first and the second airbag can also be constructed symmetrically.
  • the invention also relates to a vehicle seat which comprises an airbag arrangement according to the invention.
  • the gas bag arrangement can be detachably attached to the vehicle seat so that it can be replaced after it is triggered.
  • the first airbag and the second airbag can at least partially lie opposite one another in the seat width direction.
  • the gas bags can be arranged (in the folded state) in (opposite lateral or upper sections) of a backrest, a seat surface or a headrest of the vehicle seat or in mutually opposite armrests of the vehicle seat.
  • the vehicle seat comprises a headrest which has a rear section and two lateral sections which adjoin the rear section (in its lateral end regions).
  • the rear section (when the vehicle seat is properly arranged in a vehicle) extends essentially in a plane perpendicular to the direction of travel of the vehicle and the lateral sections protrude beyond the rear section in the direction of travel.
  • the rear section can thus extend behind the head of a vehicle occupant seated as intended on the vehicle seat and the side sections (left and right) next to the head.
  • FIG. 1 shows a schematic representation of a vehicle occupant restraint system with a gas bag arrangement in the unfolded state according to an embodiment together with a vehicle seat; 2-4 schematic representations (in plan view) of different stages of an unfolding process and fixing process of the airbag arrangement from FIG. 1;
  • FIG. 5 shows a schematic representation of a vehicle occupant restraint system with a gas bag arrangement in the unfolded state according to a further embodiment together with a vehicle seat;
  • FIG. 6-8 schematic representations (in plan view) of different stages of an unfolding process and fixing process of the airbag arrangement from FIG. 5;
  • FIG. 9 shows a schematic representation (in plan view) of a vehicle occupant
  • Fig. 10 is a schematic representation (in plan view) of a vehicle occupant
  • FIG. 1 shows a schematic illustration of a first embodiment 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 Figure 1 in the inflated state.
  • the first airbag comprises a main chamber 121 and a secondary chamber 122, which are in flow connection with one another. In the inflated state of the first gas bag 120, the main chamber 121 has a larger volume than the secondary chamber 122.
  • a vehicle occupant P is also located on a seat S of the vehicle.
  • the airbag arrangement 100 is arranged in relation to the occupant P in such a way that the main chamber 121 and the second airbag 140 extend on opposite sides of the occupant P in each case next to the occupant P.
  • the main chamber 121 and the second airbag 140 are each shaped in the inflated state in such a way that they extend at least partially laterally next to the head of the occupant P, above his shoulders and in front of the chest area of the occupant P.
  • the main chamber 121 and the second gas bag 140 are constructed or arranged (mirror) symmetrically to one another.
  • the main chamber 121 and the second gas bag 140 extend in the area of the headrest K out of the vehicle seat S in the direction of travel F.
  • the secondary chamber 122 extends in the inflated state of the gas bag arrangement 100 in front of the chest area of the vehicle occupant P and in particular also (viewed in the direction of travel F) in front of a section of the main chamber 121 and of the second gas bag 140.
  • the gas bags 120, 140 can be attached in the folded state, for example, on opposite sides of the headrest K or in the upper region of the backrest R of the seat S adjacent to the headrest K and in the headrest K or backrest R. stowable.
  • the gas bags 120, 140 are arranged on the vehicle seat S, taking their shape and size into account, in such a way that the main chamber 121 and the second gas bag 140 can touch one another in sections in the unfolded state.
  • the two gas bags 120, 140 are filled with gas at the same time by means of a common gas generator or two separate gas generators.
  • the volume flow of the gas for the two gas bags 120 140 is also essentially the same.
  • the first airbag 120 and the second airbag 140 each have a first fixing area 125, 145. Furthermore, the secondary chamber 122 of the first airbag 120 serves as a connecting element 150.
  • connection or fixing process is explained in more detail with reference to FIGS.
  • the connection between the first airbag 120 and the second airbag 140 takes place in front of the chest of the vehicle occupant P by the main chamber 121 of the first airbag 120 and the second airbag 140 during or at the end of their inflation process approach or contact.
  • the front sections 123, 143 of the main chamber 121 and of the second gas bag 140 move towards one another.
  • the first and second gas bags 120, 140 are accordingly to be arranged relative to one another on the vehicle seat S, taking into account their shape and size, so that they can approach one another sufficiently during or at the end of the inflation process, at least in the area in which the first Fixing areas 125, 145 are arranged.
  • the first fixing area 125 of the first airbag 120 and the first fixing area 145 of the second airbag 140 are each formed in the front section 123, 143 of the main chamber 121 and the second airbag 140, respectively.
  • the front sections 123, 143 are Sections which, viewed in the direction of travel F, extend in front of the airbag 120, 140 and in front of the occupant P in the inflated state.
  • the first fixing areas 125, 145 are arranged on the first and second gas bags 120, 140, respectively, in such a way that the two first fixing areas 125, 145 are directly opposite one another when the gas bags 120, 140 are inflated, so that they can form a connection with one another.
  • the first fixing regions 125, 145 are arranged in particular on mutually facing sides of the main chamber 121 of the first airbag 120 or of the second airbag 140. By connecting the first fixing regions 125, 145 to one another, the main chamber 121 of the first airbag 120 is pre-fixed on the second airbag 140.
  • the secondary chamber 122 which is formed on the front section 123 of the main chamber 121 on a side facing away from the second airbag 140, functions as a connecting element 150.
  • the connecting element 150 has a fixing region 151 which a portion of the outer surface of the sub chamber 122 is formed.
  • the fixing area 151 of the connecting element 150 is provided for interaction with a second fixing area 146 of the second gas bag 140.
  • the second fixing region 146 is formed in the front section 143 of the second gas bag 140 on its side facing away from the main chamber 121 of the first gas bag 120.
  • the fixing area 151 of the connecting element 150 and the second fixing area 146 of the second gas bag 140 act together and form an additional connection.
  • the shape, size and orientation of the secondary chamber 122 and its arrangement on the main chamber 121 are matched to the second airbag 140 (shape, size, orientation).
  • the fixing areas 125, 145, 146, 151 are each flat (for example, strip-shaped).
  • the first fixing area 125 of the first airbag 120 is attached to an outer surface of the main chamber 121 of the first airbag 120
  • the fixing area 151 of the connecting element 150 is attached to an outer surface of the secondary chamber 122 of the first airbag 120
  • the first and second fixing areas 145, 146 of the second airbag 140 on an outer surface of the second airbag 140.
  • the first fixing areas 125, 145, the fixing area 151 of the connecting element 150 and the second fixing area 146 of the second gas bag 140 are provided for forming Velcro connections.
  • the first fixing area 125 of the first airbag 120 and the fixing area 151 of the connecting element 150 each include a Velcro element and the first fixing area 145 of the second gas bag 140 and second fixing area 146 of second gas bag 140 each have a fleece element.
  • the fleece and Velcro elements can also be interchanged.
  • the gas bags 120, 140 are shown during the deployment process. This means that the main chamber 121 of the first airbag 120 and the second airbag 140 in FIG. 2 are not yet fully deployed.
  • the secondary chamber 122 of the first airbag 120 is hardly deployed.
  • the gas bags 120, 140 are in a stage of the deployment process in which the first fixing areas 125, 145 (and especially the fixing area 151 of the connecting element 150 and the second fixing area 146 of the second airbag 140) are still too far apart to to work together to form a connection.
  • FIG. 3 shows the two gas bags 120, 140 in a more advanced stage of the deployment process.
  • the front portions 123, 143 of the main chamber 121 (of the first airbag 120) and of the second airbag 140 touch each other.
  • the first fixing areas 125, 145 arranged in the front sections 123, 143 thus also come into contact with one another, at least in sections, so that the main chamber 121 and the second gas bag 140 are pre-fixed by the first fixing areas 125, 145.
  • the unfolding of the secondary chamber 122 has progressed, and the fixing area 151 of the connecting element 150 has already approached the second fixing area 146 of the second gas bag 140.
  • the distance between the fixing areas 146, 151 is still too great to interact to form a connection.
  • FIG. 4 shows the two gas bags 120, 140 in their completely unfolded state.
  • the secondary chamber 122 of the first airbag 120 is now also completely unfolded and wraps around the front section 143 of the second airbag 140.
  • the fixing area 151 of the connecting element 150 and the second fixing area 146 of the second airbag 140 also come into contact with one another, at least in sections, so that through these fixing areas 146, 151, the additional connection between the main chamber 121 and the second airbag 140 is formed.
  • FIG. 4 shows the airbag arrangement 100 in its completely connected state.
  • the head of the vehicle occupant P experienced an acceleration in the direction of travel F as a result of an accident.
  • FIG. 5 shows a schematic illustration of a second embodiment of an airbag arrangement 100 for a vehicle occupant restraint system.
  • Figures 6 to 8 show the second embodiment of the airbag arrangement 100 in three different stages of its deployment process and fixing process.
  • the stage of the second embodiment in Figure 6 corresponds to that of the first embodiment in Figure 2, the stage of the second embodiment in Figure 7 to that of the first embodiment in Figure 3 and the stage of the second embodiment in Figure 8 to that of the first embodiment in Figure 4.
  • the second embodiment differs from the first embodiment in particular in the configuration of the connecting element 150.
  • the connecting element 150 is not formed by an inflatable secondary chamber of the first gas bag, but rather by a non-inflatable fabric layer 160 which is fixed to the first gas bag 120. Accordingly, the first airbag 120 has only one main chamber, but no secondary chamber.
  • the fabric layer 160 comprises a first section 161 and a second section 162 which is located outside of the first section 161.
  • the first section 161 is fastened to the first airbag 120 by means of a releasable connection 170 which is designed as a tear seam.
  • the second section 162 is fastened to the first airbag 120 by means of a non-releasable connection 180.
  • the first and second sections 161, 162 are located in opposite end regions of the fabric layer 160. Between the first section 161 and the second section 162 there is, for example, a third section 163 in which there is no connection between the fabric layer 160 and the first airbag 120 is formed.
  • the first section 161 is arranged on a side of the first airbag 120 facing away from the vehicle occupant in its front section 123, while the second section 162 faces the occupant P in a comparative manner (when the airbag arrangement 100 is arranged as intended).
  • the non-detachable connection 180 is thus located between the vehicle occupant P and the detachable connection 170 when the airbag arrangement 100 is in the intended state.
  • the fixing area 151 of the connecting element 150 is formed on the side of the fabric layer 160 facing away from the first airbag 120, in particular in its first and third sections 161, 163.
  • the fixing area 151 is not formed here in the second section 162 of the fabric layer 160.
  • the fixing region 151 can also extend over the entire fabric layer 160.
  • FIG. 6 the gas bags 120, 140 (corresponding to FIG. 2) are shown during the deployment process. This means that the gas bags 120, 140 are not yet completely unfolded.
  • the releasable connection 170 is intact, so that the fabric layer 160 is essentially in contact with the first airbag 120.
  • the pre-fixing by the first fixing areas 125, 145 has not yet taken place.
  • FIG. 7 shows the two gas bags 120, 140 in a further advanced stage of the deployment process corresponding to FIG. 3.
  • the two gas bags 120, 140 have been pre-fixed by the first fixing areas 125, 145.
  • the releasable connection 170 has meanwhile failed (for example as a result of the tightening of the envelope of the first airbag 120 during the inflation process due to the increasing internal pressure in the interior of the first airbag 120).
  • the first section 161 and the third section 163 (which is located between the first and the second section 162) are now freely movable with respect to the first airbag 120, while the fabric layer 160 continues to be attached to the second section 162 via the non-detachable connection 180 in its second section 162 first airbag 120 is set.
  • the first and third sections 161, 163 move towards the second fixing region 146 of the second airbag 140.
  • a small section of the fixing area 151 of the connecting element 150 already interacts with the second fixing area 146 of the second gas bag 140.
  • the two gas bags 120, 140 can finally be seen (corresponding to FIG. 4) in their completely unfolded state.
  • the front section 143 of the second airbag 140 has moved towards the connecting element 150 as a result of the ongoing deployment process.
  • the connecting element 150 has moved further in the direction of the second fixing region 146 of the second gas bag 140.
  • the fixing area 151 of the connecting element 150 and the second fixing area 146 of the second airbag 140 now come into contact with one another as intended, so that the additional connection between the two airbags 120, 140 is formed by these fixing areas 146, 151.
  • the airbag arrangement (100) is in its completely connected state.
  • FIG. 9 shows the airbag arrangement 100 according to the first embodiment (FIGS. 2 to 4) together with a vehicle seat S, the headrest K of which differs from that shown in FIGS. 2 to 4.
  • the headrest K comprises a rear section K H and two lateral sections K s which adjoin the rear section K H.
  • the rear section K H extends in The state of the vehicle seat S arranged as intended in a vehicle is essentially in a plane perpendicular to the direction of travel F.
  • the lateral sections Ks protrude from the end sections of the rear section KH in the direction of travel.
  • the lateral sections Ks can include an angle not equal to zero with the direction of travel F.
  • the sections KH and Ks of the headrest K thus form a receptacle for the head of the vehicle occupant P.
  • the lateral sections Ks of the headrest K are significantly further apart than in the case of the headrest K from FIGS Headrest K recording formed comparatively large.
  • the completely connected state of the airbag arrangement 100 pre-fixing and additional connection
  • a failure of the additional connection (between the fixing area 151 of the connecting element 150 and the second fixing area 146 of the second gas bag 140) due to the force exerted by the vehicle occupant P can be counteracted.
  • the headrest K from FIG. 9 can also be combined with the other embodiments of the airbag arrangement 100.
  • FIG. 10 shows a third embodiment of the airbag arrangement 100, the airbag arrangement 100 being in a stage of the unfolding process and fixing process which corresponds to the stage of the first embodiment shown in FIG.
  • the third embodiment differs from the first embodiment in particular in that the first airbag 120 and the second airbag 140 each have an additional chamber 124, 144.
  • the additional chambers 124, 144 are each in flow connection with the corresponding main chamber 121, 141.
  • the additional chambers 124, 144 each have a smaller volume than the main chambers 121, 141 in the inflated state of the gas bag arrangement.
  • the additional chambers 124, 144 are of the same size and
  • the additional chambers 124, 144 are arranged on the inside of the main chambers 121, 141 which, as intended, face the vehicle occupant P in each case.
  • the additional chambers 124, 144 (viewed in the direction of travel F) are located behind the first fixing areas 125, 145.
  • the additional chambers 124, 144 are thus between the vehicle occupant P and the first fixing areas 125, 145.
  • the additional chambers 124, 144 shield the first fixing regions 125, 145 from the impacting vehicle occupant P and serve to strengthen the connection between the two airbags 120, 140.

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

Abstract

L'invention concerne un ensemble airbag (100) pour un système de retenue d'occupant de véhicule comprenant au moins un premier et un second airbag (120, 140) qui peut être gonflé pour protéger un occupant de véhicule, le premier et le second airbag (120, 140) étant chacun destinés à être disposés sur un siège de véhicule (S). L'ensemble airbag (100) comprend en outre une première zone de fixation (125) du premier airbag (120) et une première zone de fixation (145) du second airbag (140), les deux airbags (120, 140) pouvant être reliés l'un à l'autre par le biais des premières zones de fixation (125, 145). Un élément de liaison (150) est prévu, par le biais duquel une liaison supplémentaire entre les deux airbags (120, 140) peut être formée.
PCT/EP2020/079780 2019-12-17 2020-10-22 Ensemble airbag pour un système de retenue d'occupant de véhicule WO2021121737A1 (fr)

Priority Applications (2)

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CN202080085074.3A CN115151452A (zh) 2019-12-17 2020-10-22 用于车辆乘员约束系统的气囊组件
DE112020006169.8T DE112020006169A5 (de) 2019-12-17 2020-10-22 Gassackanordnung für ein Fahrzeuginsassen-Rückhaltesystem

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DE102019134729.7 2019-12-17
DE102019134729 2019-12-17

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US20220396233A1 (en) * 2021-06-09 2022-12-15 Toyota Jidosha Kabushiki Kaisha Seat-mounted airbag device
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US11745686B2 (en) 2021-10-08 2023-09-05 Toyota Jidosha Kabushiki Kaisha Seat-mounted airbag device
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US11745693B2 (en) * 2021-06-09 2023-09-05 Toyota Jidosha Kabushiki Kaisha Seat-mounted airbag device
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US11745686B2 (en) 2021-10-08 2023-09-05 Toyota Jidosha Kabushiki Kaisha Seat-mounted airbag device

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