Vehicle seat with a seating arrangement and an airbag device

Abstract

Vehicle seat (1) for a motor vehicle, having a seating arrangement which comprises a seat cushion (2) and a backrest (3), and having an airbag device which has at least one airbag (5, 6) and at least one catch element (14, 15, 16, 17, 18) which can be tensioned by filling the at least one airbag (5, 6), the catch element (14, 15, 16, 17, 18) having at least one first attachment region (19, 24) in which the catch element (14, 15, 16, 17, 18) is coupled to the airbag (5, 6), and the catch element (14, 15, 16, 17, 18) having at least one second attachment region (20, 23) in which the catch element (14, 15, 16, 17, 18) is coupled to the seating arrangement, the at least one catch element (14, 15, 16, 17, 18) being formed in a belt-like manner in the at least one first attachment region (19, 24), characterized in that the at least one catch element (14, 15, 16, 17, 18) is at least in one section (22),which is connected to the at least one first attachment region (19, 24), has a cross-section for which a ratio of a thickness (27) of the catching element (14, 15, 16, 17, 18) to a width (28) of the catching element (14, 15, 16, 17, 18) is greater than in the belt-shaped at least one first attachment region (19, 24) of the at least one catching element (14, 15, 16, 17, 18), wherein directions of the thickness (27) and the width (28) of the at least one catching element (14, 15, 16, 17, 18) are perpendicular to each other, wherein both the thickness (27) of the catching element which can be determined perpendicular to the width direction of the catching element (14, 15, 16, 17, 18) and the width (28) of the catching element which can be determined perpendicular to the thickness direction. (14, 15, 16, 17, 18) are measured in the direction of a respective greatest distance from the outer sides of the catching element (14, 15, 16, 17, 18), wherein in the at least one section (22) the thickness (27) of the catching element (14, 15, 16, 17,18) is substantially equal to the width (28) of the catching element (14, 15, 16, 17, 18), and wherein the at least one catching element (14, 15, 16, 17, 18) in the at least one first connection region (19, 24) is connected to an outer side (29) of a wall of the at least one airbag (5, 6) by sewing and / or gluing and / or welding the catching element (14, 15, 16, 17, 18) to the wall of the at least one airbag (5, 6).

Description

[0001] The invention relates to a vehicle seat for a motor vehicle, comprising a seat system comprising a seat cushion and a backrest. An airbag device of the vehicle seat has at least one airbag and at least one arresting element. By inflating the at least one airbag, the at least one arresting element can be tensioned. The arresting element has at least one first connection area in which the arresting element is coupled to the airbag. The arresting element has at least one second connection area in which the arresting element is coupled to the seat system.

[0002] DE 10 2017 131 140 A1 describes a vehicle occupant protection system comprising a vehicle seat, two airbags, and two energy absorption bands. One end of each energy absorption band is attached to an upper end of an airbag module at a fastening point, with the airbag module being arranged in a side bolster of a backrest of the vehicle seat. The other end of each energy absorption band is attached to the corresponding airbag at the height of the vehicle occupant's upper body.

[0003] DE 10 2013 224 666 A1 describes a motor vehicle seat for a vehicle occupant, with a safety belt designed as a chest belt. The motor vehicle seat also has an airbag with a face area that extends toward the face of the vehicle occupant when activated.

[0004] JP 2019 - 147 426 A describes a protection device for a seat occupant, wherein a retaining strap is coupled to a side portion of an airbag. When not deployed, the airbag is accommodated in an upper portion of a seatback. When the airbag is deployed, a tension device can be used to exert tension on the retaining strap.

[0005] DE 10 2018 123 633 A1, published after the filing date of the present application, describes a vehicle seat assembly for a motor vehicle having a backrest, a seat, and two airbag modules arranged on opposite lateral sides of the backrest. A retaining means mechanism of the vehicle seat assembly comprises a retaining means assembly formed from a plurality of retaining straps, wherein the retaining means assembly is attached to the airbag, to the seat at one end, and to the backrest at the other end.

[0006] US 2017 / 0 259 774 A1 describes a restraint device for a vehicle occupant sitting on a vehicle seat, in which a stretchable fabric strap has side panels. In the area of ​​the side panels, the stretchable fabric strap is coupled to the respective airbags of the restraint device.

[0007] DE 10 2019 118 843 A1, published after the filing date of the present application, describes a vehicle seat with an airbag. A tensioning strap extends continuously from one side of a backrest section of the vehicle seat across a front side of the airbag to the opposite side of the backrest section. Both ends of the tensioning strap are firmly attached to the backrest section. A front tensioning strap section is firmly connected to the front side of the airbag, while lateral tensioning strap sections are not fixed to the airbag along their entire length.

[0008] In a vehicle seat with a so-called cocoon airbag, i.e., an airbag designed like a cocoon, the occupant of the vehicle seat is protected in the event of an impact by an airbag that is stowed in the vehicle seat in an initial state, i.e., before deployment, and envelops the occupant at least partially when deployed. In a vehicle seat with a cocoon airbag, retaining straps are typically used as retention elements to hold back the inflated airbag. These retaining straps or retention straps ensure that the inflated airbag is held in a predetermined position relative to the vehicle seat system in its functional position, in which the inflated airbag provides protection for the occupant.

[0009] However, it has been found that the use of retaining straps to retain the Cocoon airbag makes it difficult to position the airbag in the seat system in the initial state of the airbag device and also to deploy the airbag in the event of the airbag device being triggered.

[0010] Furthermore, DE 198 45 992 A1 describes a motor vehicle seat with a seat element and a backrest element. A compartment for a side airbag is formed within these two components. When the airbag is deployed following deployment of a side airbag device encompassing the airbag, a support strap is tensioned. The support strap comprises a steel cable, which is pulled by a tensioning device when the airbag is deployed. The steel cable is connected to a section of the support strap designed as a wide, flat fabric strap. The fabric strap of the support strap arranged within the airbag is secured to the backrest element by means of a screw at its end opposite the steel cable. In contrast, the tensioning device designed to tension the steel cable is connected to the motor vehicle seat in the region of the seat element.

[0011] Even in such a vehicle seat, the support strap makes it difficult to position and deploy the airbag.

[0012] It is an object of the invention to provide a vehicle seat of the type mentioned at the outset in which the installation and deployment of at least one airbag is particularly simple.

[0013] This object is achieved according to the invention by a vehicle seat having the features of patent claim 1. Advantageous embodiments of the invention are the subject of the dependent patent claims and the description.

[0014] A vehicle seat according to the invention for a motor vehicle comprises a seat system with a seat cushion and a backrest, and an airbag device which has at least one airbag and at least one catch element. The at least one catch element can be tensioned by filling the at least one airbag. The catch element has at least one first connection region in which the catch element is coupled to the airbag. The catch element has at least one second connection region in which the catch element is coupled to the seat system. In at least one section which adjoins the at least one first connection region, the at least one catch element has a cross-section for which a ratio of a thickness of the catch element to a width of the catch element is greater than for a band-shaped catch element.In other words, the at least one catching element in the at least one section has a cross-section that differs from the cross-section of a band-shaped catching element. While in a band-shaped catching element, or in a catching element designed as a catching strap or retaining strap, the width of the catching element is much greater than the thickness of the catching element, this is not the case with the at least one catching element having a cross-section that differs from the cross-section of a band-shaped catching element.

[0015] In the case of a band-shaped catch element, the width of the catch element is typically a multiple of the thickness of the catch element, for example at least ten times the thickness. In contrast, in the case of the at least one catch element which can be tensioned by inflating the at least one airbag, the ratio of the thickness of the catch element to the width of the catch element in at least one section is greater than, for example, 1:10, in particular greater than 1:5, preferably greater than 1:3. The directions of the thickness and the width of the catch element are perpendicular to one another. And both the thickness of the catch element, which can be determined perpendicular to the width direction of the catch element, and the width of the catch element, which can be determined perpendicular to the thickness direction, are measured in the direction of a respective greatest distance from the outer sides of the catch element.

[0016] In the at least one first connection area, in which the at least one catch element is coupled to the airbag, the at least one catch element is band-shaped. This ensures a particularly robust connection of the catch element to the airbag, namely by sewing and / or gluing and / or welding the catch element to a wall of the airbag.

[0017] In the vehicle seat according to the invention, the thickness of the catch element in at least one section is substantially equal to the width of the catch element. The cross-section of the at least one catch element then results in particularly low flexural rigidity of the catch element in at least one section. This facilitates the simplified installation and deployment of the airbag.

[0018] This is particularly true if the at least one catch element has a substantially round cross-section in the at least one section. In other words, the at least one catch element can be designed in the manner of a rope in the at least one section. This makes it particularly easy to ensure that, following deployment of the airbag device and the concomitant filling of the at least one airbag with the filling medium, i.e., inflation of the airbag, the at least one airbag particularly quickly and reliably reaches its predetermined functional position, in which the at least one airbag provides impact protection for a seat occupant of the vehicle seat.

[0019] In the vehicle seat according to the invention, the at least one catch element is connected in the at least one first connection region to an outer side of the wall of the at least one airbag. Thus, on the one hand, the at least one airbag can be held particularly well in its functional position by means of the at least one catch element or retaining element. Furthermore, the at least one catch element thus interferes with the deployment of the at least one airbag to a particularly small extent.

[0020] The provision of the comparatively large thickness-to-width ratio of the catching element is based on the realization that a band-shaped catching element has increased flexural rigidity when bent around an axis oriented perpendicular to a broad side of the band-shaped catching element. In contrast, a band-shaped catching element or catching strap can be bent more easily around axes oriented perpendicular to a longitudinal direction of the catching strap and lying in the plane of the broad side of the catching strap.

[0021] Due to the presently small difference between the thickness of the arresting element and the width of the arresting element in the at least one section, the at least one arresting element, which can be tensioned by the inflation of the at least one airbag, has a comparatively low flexural rigidity in all directions, at least in the section, in contrast to a band-shaped arresting element. This is because the at least one arresting element is designed to be flexible in the at least one section, for example, in the manner of a rope.

[0022] By providing this cross-section in the at least one section of the at least one catch element, both the more difficult installation and the more difficult deployment of the at least one airbag upon deployment of the airbag device are counteracted. Consequently, the installation and deployment of the at least one airbag are particularly easy in this vehicle seat. This is because the profile cross-section of the at least one catch element in the at least one section does not influence the flexural rigidity in such a way that bending or kinking of the at least one catch element in the at least one section would be difficult.

[0023] In a manner known per se, the triggering of the airbag device ensures that, upon detection of a very strong deceleration of a motor vehicle having the vehicle seat, at least one airbag of the airbag device is filled with a filling medium and thus provides impact protection for the seat occupant.

[0024] Preferably, the at least one section extends from the at least one first connection region to the at least one second connection region. Accordingly, the at least one catch element can have a cross-section that differs from the cross-section of a band-shaped catch element, for example, a substantially round cross-section, along the entire distance between the first connection region and the second connection region. This ensures particularly low flexural rigidity of the at least one catch element along the entire distance between the connection regions.

[0025] Preferably, the at least one second connection region comprises a pulling device. The pulling device is designed to exert a pulling force on the at least one inflated airbag, directed toward the seat system, upon deployment of the airbag device. For example, the pulling device can be designed in the manner of a belt tensioner, which, after deployment of the airbag device, pulls the airbag toward a seat occupant located on the seat system of the vehicle seat. In this way, particularly reliable restraint of the seat occupant on the seat system of the vehicle seat can be achieved. In the region of the pulling device, the arresting element can, for example, comprise a wire rope, via which the pulling force is applied to the remaining region of the arresting element.

[0026] The at least one airbag preferably comprises a side part and a front part fluidically connected to the side part. When the airbag is inflated, the side part extends from a narrow side of the backrest in the longitudinal direction of the vehicle seat to the front part. Furthermore, the front part is designed to provide impact protection for a head and / or upper body of a seat occupant in the longitudinal direction of the vehicle seat when the airbag is inflated. In other words, the head and / or upper body of the seat occupant can impact the front part of the at least one airbag in the longitudinal direction when the airbag device is triggered and the at least one airbag is thus filled with an inflation medium. The inflation medium can be a gas provided by a gas generator and / or stored under high pressure in a gas reservoir.

[0027] In such an airbag, the side panel provides impact protection in the transverse direction of the vehicle seat, and the front panel provides impact protection in the longitudinal direction of the vehicle seat. Consequently, such an airbag provides particularly extensive impact protection for the occupant of the vehicle seat. Furthermore, it is particularly advantageous for such an airbag if the at least one catch element allows the unhindered deployment of the side panel and the front panel, thus facilitating the assumption of a functional position of the side panel and the front panel.

[0028] Preferably, the side part is coupled by means of the at least one catch element, on the one hand, to the backrest and, on the other hand, to a supporting structure of the seat cushion. Additionally or alternatively, the front part is preferably coupled by means of the at least one catch element, on the one hand, to the backrest and, on the other hand, to a supporting structure of the seat cushion. Such a connection of the at least one catch element to the seat system and to the at least one airbag allows the desired functional position of the airbag to be specified particularly well. Furthermore, a particularly secure coupling of the at least one airbag to the seat system of the vehicle seat is achieved.

[0029] Preferably, the at least one catch element is coupled to the support structure of the seat cushion in the region of a front edge of the seat cushion. This connects the airbag to the seat system, which provides particularly good impact protection for the vehicle seat occupant after the airbag device is deployed.

[0030] Preferably, the at least one catch element branches from the second connection area, in which the catch element is coupled to the support structure of the seat cushion, to the front part and to the side part. This eliminates the need for separate connections of the respective catch elements to the support structure of the seat cushion, and the effort required to provide the airbag device is particularly low.

[0031] The vehicle seat may be provided with a first airbag and a second airbag. The first airbag and the second airbag each comprise a side section and a front section. Furthermore, the first airbag and the second airbag are arranged opposite one another on the seat system in the transverse direction of the vehicle seat. By providing two such airbags, it is possible to ensure that the inflated airbags envelop the seat occupant to a particularly large extent, thus providing particularly extensive impact protection both in the longitudinal direction of the vehicle seat and in the transverse direction of the vehicle seat.

[0032] When a vehicle seat is installed in the motor vehicle, the longitudinal direction of the vehicle seat preferably runs parallel to the vehicle's longitudinal axis, and the transverse direction of the vehicle seat preferably runs parallel to the vehicle's transverse axis.

[0033] It has proven particularly cost-effective to couple the front sections of both airbags to a seat cushion support structure using the same retention element. A continuous retention element can then be used to couple the front sections of both airbags to the vehicle seat system in the area of ​​the seat cushion support structure.

[0034] Preferably, in an initial state of the airbag device, the at least one airbag and / or the at least one catch element are arranged in at least one receiving space formed in the backrest of the vehicle seat. In the initial state of the airbag device, the at least one airbag is located before the at least one airbag is filled. In other words, in the initial state of the airbag device, the at least one airbag is not yet filled with the filling medium and has not yet been deployed. In this initial state, in which the at least one airbag is thus in its stowed position, accommodating the at least one airbag and / or the at least one catch element in the receiving space formed in the backrest of the vehicle seat ensures that the filled at least one airbag can provide very reliable impact protection for a seat occupant of the vehicle seat.

[0035] In addition, the at least one airbag and the at least one catch element can be deployed or removed particularly easily from the receiving space formed in the backrest of the vehicle seat when the airbag device is triggered.

[0036] In an initial state of the airbag device, in which the at least one airbag is located prior to inflation of the at least one airbag, at least a portion of the at least one catch element can be arranged in a receiving space provided within a safety belt of the vehicle seat. The safety belt is designed to restrain a seat occupant of the vehicle seat. This also ensures particularly unhindered deployment of the at least one catch element from the receiving space and particularly unhindered deployment of the at least one airbag during inflation following the deployment of the airbag device.

[0037] Further features of the invention emerge from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective specified combination, but also in other combinations or on their own.

[0038] The invention will now be explained in more detail using preferred embodiments and with reference to the drawings. They show: Fig. 1 shows a schematic representation of a vehicle seat for a motor vehicle, which comprises a seat cushion and a backrest, wherein two airbags of an airbag device of the vehicle seat are shown in their deployed or inflated state, and wherein the two airbags are held by arresting cables by means of which the airbags are pulled against a seat occupant of the vehicle seat; Fig. 2 shows a further schematic perspective view of a variant of the vehicle seat in which only a triggered or filled airbag provides impact protection for the occupant of the vehicle seat; Fig. 3 section of the vehicle seat according to Fig. 2 in another perspective view; and Fig. 4 section of the vehicle seat according to Fig. 2 in another perspective view.

[0039] Fig. 1 shows a schematic perspective view of a vehicle seat 1 of a Fig. 1 not shown in detail. The vehicle seat 1 comprises a seat system with a seat cushion 2 and a backrest 3. The seat cushion 2 is Fig. 1, for the sake of clarity, only a supporting structure 4 is shown, by which a substructure for a (not shown) upholstery of the seat cushion 2 is formed.

[0040] The vehicle seat 1 further comprises an airbag device, of which Fig. 1, a first airbag 5 and a second airbag 6 are shown. The two airbags 5, 6 are arranged opposite one another in the transverse direction y of the vehicle seat 1 on the seat system, which comprises the seat cushion 2 and the backrest 3. The transverse direction y runs when the vehicle seat 1 is arranged in the (in Fig. 1 (not shown) motor vehicle parallel to the vehicle's transverse axis. Accordingly, a longitudinal direction x of the vehicle seat 1 runs parallel to the vehicle's longitudinal axis in the installed position of the vehicle seat 1 in the motor vehicle.

[0041] Each of the two airbags 5, 6 comprises a side part 7, 8 and a front part 9, 10. The side parts 7, 8 can also be referred to as side chambers and the front parts 9, 10 as front chambers of the respective airbag 5, 6, which are fluidically connected or communicate with the side chambers. Fig. 1 left airbag 5, the filled side part 7 and the front part 9 arranged longitudinally in front of a head 11 of a seat occupant 12 of the vehicle seat 1 are clearly visible. Furthermore, the shape of the front part 10, which belongs to the second airbag 6, is also shown in Fig. 1. Accordingly, the front parts 9, 10 of the two airbags 5, 6 extend upward above the thighs of the seat occupant 12, so that the two front parts 9, 10, when the airbags 5, 6 are inflated, provide impact protection, in particular for the head 11 of the seat occupant 12 in the longitudinal direction x of the vehicle seat 1.

[0042] From the side part 8 of the second airbag 6 is in Fig. 1, only a small section is visible. However, from the view of the similarly constructed side part 7 of the first airbag 5, it can be seen that the respective side parts 7, 8 extend from a lower region of a respective narrow side 13 of the backrest 3 to the respective front part 9, 10. Accordingly, the side parts 7, 8 of the two airbags 5, 6 provide lateral impact protection for the seat occupant 12 of the vehicle seat 1.

[0043] In order to inflate the airbags 5, 6 in the deployed state and filled with an inflation medium, which Fig. 1, in its functional position and at the same time to pull against the seat occupant 12, the airbag device of the vehicle seat 1 has a plurality of catching elements 14, 15, 16, 17, 18, of which in Fig. 1, some are provided with a corresponding reference numeral. For example, the catch element 14 serves to retain the side part 7 of the first airbag 5. This catch element 14 is connected or coupled in a first connection area 19 to an outer side 29 of a wall of the airbag 5, specifically to an outer side of a wall of the side part 7.

[0044] In a second, in Fig. 1 connection area, which is not visible, the catch element 14 is coupled to the backrest 3 of the vehicle seat 1. This should be explained with reference to Fig. 3, even if in Fig. 3 shows a variant of the vehicle seat 1 in which the seat occupant 12 is protected only by one airbag, for example the right airbag 5 as viewed in the direction of travel of the motor vehicle when driving forward.

[0045] According to Fig. 3, a pulling device in the form of a belt tensioner 21 is provided in the second connection area 20, in which, for example, the catch element 14 is coupled to the backrest 3 of the vehicle seat 1. When the airbag device is triggered, the airbag 5, 6 is pulled toward the seat occupant 12 of the vehicle seat 1 via respective belt tensioners 21 by means of the respective catch element 14, 15, 17, 18. For example, the belt tensioner 21 or cable tensioner can exert tension on a wire cable (not shown) which is coupled at a coupling point to a respective base body of the catch element 14, 15, 17, 18.

[0046] In the first connection area 19, in which, for example, the catch element 14 is coupled to the side part 7 of the airbag 5, the catch element 14 is in this case band-shaped. In contrast, the respective catch element 14, 15, 17, 18 has a cross-section in a section 22 between the connection areas 19, 20 to the airbag 5, 6 on the one hand and to the backrest 3 on the other hand, which differs from the cross-section of a band-shaped catch element.

[0047] Preferably, the catch elements 14, 15, 16, 17, 18 in this respective section 22 are designed in the manner of ropes. Accordingly, a thickness 27 of the catch element 14, 15, 16, 17, 18 is substantially equal to a width 28 of the catch element 14, 15, 16, 17, 18. In particular, the catch elements 14, 15, 16, 17, 18 in this respective section 22 can have a substantially round cross-section.

[0048] As described above by way of example for the catch element 14, the design of the sections 22 in the manner of ropes is preferably also provided for the remaining catch elements 15, 16, 17, 18. For example, the catch element 16 has the first connection area 19, in which the catch element 16 is coupled to the side part 7 of the first airbag 5. Furthermore, the catch element 16 has a second connection area 23, in which the catch element 16 is coupled to the support structure 4 of the seat cushion 2.

[0049] In the section 22 between this first connection area 19 and the second connection area 23, the catch element 16 is designed as a cable. From the same second connection area 23, the catch element 16 branches off toward the front part 9 of the first airbag 5. Here, the catch element 16 is coupled to the front part 9 in a first connection area 24. In the first connection area 24, the catch element 16 can be band-shaped, as shown here by way of example.

[0050] In the section 22 between this first connection area 24 and the second connection area 23, in which the catch element 16 is coupled to the support structure 4 of the seat cushion 2, this catch element 16 is also designed in the manner of a rope, which, for example, has a substantially round cross-section. For each of the Fig. 1, the ratio of the thickness 27 of the respective catch element 14, 15, 16, 17, 18 to the width 28 of the catch element 14, 15, 16, 17, 18 is greater than in the case of a band-shaped catch element.

[0051] From a Fig. 1, it can be seen that the catching elements 14, 15, 16, 17, 18 in the respective section 22 have a cross-section for which the thickness 27 of the catching element 14, 15, 16, 17, 18 is preferably substantially equal to the width 28 of the catching element 14, 15, 16, 17, 18.

[0052] This is also the case with the catch element 15, which is coupled on the one hand to the backrest 3 and on the other hand to the front part 9 of the first airbag 5. The same applies to the catch element 17, which is coupled on the one hand to the backrest 3 and on the other hand to the front part 10 of the second airbag 6. And the statements regarding the catch element 14 apply analogously to the catch element 18, which ensures the retention of the second airbag 6 and via which the second airbag 6 is pulled toward the seat occupant 12 of the vehicle seat 1 by means of a pulling device upon the airbag device being triggered.

[0053] Out of Fig. 1 further shows that the catch element 16 branches off from the second connection area 23, in which the catch element 16 is coupled to the support structure 4 of the seat cushion 2, to the side part 7 of the first airbag 5 and to the front part 9 of the first airbag 5. Furthermore, it can be seen that the front parts 9, 10 of the two airbags 5, 6 are coupled to the support structure 4 of the seat cushion 2 by means of the same catch element 16.

[0054] In a variant of the vehicle seat 1, it can be provided that a respective catch element couples the respective front part 9, 10 to the support structure 4, and that a further respective catch element couples the side parts 7, 8 of the airbags 5, 6 to the support structure 4.

[0055] At the Fig. In the variant of the vehicle seat 1 shown in Figure 2, the airbag device only has the Fig. 1 right airbag 5, which includes the side part 7 and the front part 9. In this variant, however, the front part 9 is significantly larger than in the Fig. 1 shown variant. And the front part 9 extends in the transverse direction y of the vehicle seat 1 further towards the side of the vehicle seat 1 opposite the side part 7 than in the variant of the vehicle seat 1 according to Fig. 1 is the case. Here too, however, the front part 9 provides impact protection for the head 11 and the upper body of the seat occupant 12.

[0056] Furthermore, Fig. 2 the course of the catch element 14 along the backrest 3 towards the side part 7 is clearly visible and also the course of the catch element 15, which is fixed on the one hand to the backrest 3 and on the other hand holds back the front part 9 of the airbag 5. The two in Fig. The catch elements 14, 15 shown in Figure 2 also have Fig. Figure 1 illustrates a cross-section different from the cross-section of a band-shaped catch element in the sections 22 between the first connection area 19, in which the coupling to the airbag 5 is formed, and the second connection area, in which the catch elements 14, 15 are coupled to the backrest 3. For example, the catch elements 14, 15 in the respective sections 22 can have a round cross-section and thus be designed in the manner of a rope.

[0057] The course of the catch elements 14, 15 from the connection areas to the side part 7 and the front part 9 on the one hand to the connection areas to the backrest 3 on the other hand is also shown in the perspective view of the vehicle seat 1 in Fig. 3 clearly visible.

[0058] In Fig. 3, only a traction device in the form of the belt tensioner 21 or cable tensioner is schematically shown. However, the respective arresting cables or arresting elements 14, 15, 17, 18, which are coupled to the backrest 3 in the second connection area 20, preferably have a respective belt tensioner 21 or cable tensioner of this type. Fig. 3 also shows a piece of the catch element 16, by means of which the side part 7 of the airbag 5 is coupled to the supporting structure 4 of the seat cushion 2.

[0059] Furthermore, in Fig. 2 shows a section of a safety belt 25 of the vehicle seat 1. The safety belt 25 serves in a known manner to restrain the seat occupant 12 on the vehicle seat 1 in the event of an impact. Unlike in Fig. 2, it can be provided that at least a partial area of ​​the catch elements 14, 15 is arranged in a receiving space formed in the safety belt 25 in an initial state of the airbag device, in which the airbag 5 is not yet filled.

[0060] In the present case, however, it is provided that the catch elements 14, 15, 16, 17, 18 and the airbags 5, 6 are stowed in respective receiving spaces 26 when the airbag device has not yet been triggered, wherein this respective receiving space 26 is formed in the backrest 3 of the vehicle seat 1. In Fig. 3 schematically shows the location of the receiving space 26 for the first airbag 5 in the area of ​​the backrest 3. Accordingly, the receiving spaces 26 for the airbags 5, 6 and the catch elements 14, 15, 16, 17, 18 associated with the respective airbag 5, 6 can be located in particular in the area of ​​the narrow sides 13 of the backrest 3.

[0061] In the resting state or initial state of the airbag device, in which the at least one airbag 5, 6 is not yet inflated, the sections 22 of the catching elements 14, 15, 16, 17, 18 preferably also run along the narrow sides 13 of the backrest 3.

[0062] Out of Fig. 4 clearly shows how the side part 7 of the airbag 5 extends in the longitudinal direction x of the vehicle seat 1 from the narrow side 13 of the backrest 3 to the front part 9. Furthermore, Fig. 4 particularly clearly shows how the front part 9 provides impact protection for the head 11 of the seat occupant 12 in the event of an impact with the airbag 5. This is because, in the longitudinal direction x of the vehicle seat 1, the front part 9 is located in front of the head 11 of the seat occupant 12. And also in the transverse direction y of the vehicle seat 1, the front part 9 overlaps with the head 11 of the seat occupant 12.

[0063] By replacing the retention straps typically provided as retaining elements of the at least one airbag 5, 6 with the retention elements 14, 15, 16, 17, 18, which are designed as retention cables at least in the section 22, both the deployment and deployment of the at least one airbag 5, 6 in a crash are simplified. This is because, in the sections 22, which are preferably designed as cable-like structures, there is no influence on the flexural rigidity of the cables due to their profile cross-sections.

[0064] In the present case, in particular, a retention of an airbag 5, 6 providing a kind of cocoon for the seat occupant 12, i.e. a so-called cocoon airbag 5, 6, is realized by means of the catch elements 14, 15, 16, 17, 18 which are designed as ropes at least in sections. List of reference symbols 1 vehicle seat 2 seat cushions 3 backrest 4 Supporting structure 5 airbags 6 airbags 7 Side panel 8 Side panel 9 Front part 10 Front part 11 head 12 seat occupants 13 Narrow side 14 Catch element 15 Catch element 16 Catch element 17 Catch element 18 Catch element 19 Connection area 20 connection area 21 Belt tensioners Section 22 23 Connection area 24 connection area 25 Seat belt 26 Recording room 27 thickness 28 width 29 Outside x longitudinal direction y transverse direction

Claims

[1] Vehicle seat (1) for a motor vehicle, with a seat system which comprises a seat cushion (2) and a backrest (3), and with an airbag device which has at least one airbag (5, 6) and at least one catch element (14, 15, 16, 17, 18) which can be tensioned by filling the at least one airbag (5, 6), wherein the catch element (14, 15, 16, 17, 18) has at least one first connection area (19, 24) in which the catch element (14, 15, 16, 17, 18) is coupled to the airbag (5, 6), and wherein the catch element (14, 15, 16, 17, 18) has at least one second connection area (20, 23) in which the catch element (14, 15, 16, 17, 18) is coupled to the seat system, wherein the at least one catch element (14, 15, 16, 17, 18) is band-shaped in the at least one first connection area (19, 24), characterized bythat the at least one catching element (14, 15, 16, 17, 18) has, at least in a section (22) which adjoins the at least one first connection region (19, 24), a cross-section for which the ratio of a thickness (27) of the catching element (14, 15, 16, 17, 18) to a width (28) of the catching element (14, 15, 16, 17, 18) is greater than in the band-shaped at least one first connection region (19, 24) of the at least one catching element (14, 15, 16, 17, 18), wherein directions of the thickness (27) and the width (28) of the at least one catching element (14, 15, 16, 17, 18) are perpendicular to one another, wherein both the directions perpendicular to the width direction of the catching element (14, 15, 16, 17, 18) determinable thickness (27) of the catching element as well as the width (28) of the catching element determinable perpendicular to the thickness direction.(14, 15, 16, 17, 18) are dimensioned in the direction of a respective greatest distance from outer sides of the catching element (14, 15, 16, 17, 18), wherein in the at least one section (22) the thickness (27) of the catching element (14, 15, 16, 17, 18) is substantially equal to the width (28) of the catching element (14, 15, 16, 17, 18), and wherein the at least one catching element (14, 15, 16, 17, 18) is connected in the at least one first connection region (19, 24) by sewing and / or gluing and / or welding the catching element (14, 15, 16, 17, 18) to a wall of the at least one airbag (5, 6) with an outer side (29) of the wall of the at least an airbag (5, 6). [2] Vehicle seat (1) according to claim 1, characterized by that the at least one catching element (14, 15, 16, 17, 18) has a substantially round cross-section in the at least one section (14, 15, 16, 17, 18). [3] Vehicle seat (1) according to one of the preceding claims, characterized bythat the at least one section (22) extends from the at least one first connection region (19, 24) to the at least one second connection region (20, 23). [4] Vehicle seat (1) according to one of the preceding claims, characterized by in that the at least one second connection region (20) comprises a pulling device (21) which is designed to exert a pulling force directed towards the seat system on the at least one filled airbag (5, 6) as a result of the airbag device being triggered. [5] Vehicle seat (1) according to one of the preceding claims, characterized byin that the at least one airbag (5, 6) comprises a side part (7, 8) and a front part (9, 10) fluidically connected to the side part (7, 8), wherein the side part (7, 8) extends from a narrow side (13) of the backrest (3) in the longitudinal direction (x) of the vehicle seat (1) towards the front part (9, 10) when the airbag (5, 6) is inflated, and wherein the front part (9, 10) is designed to provide impact protection for a head (11) and / or an upper body of a seat occupant (12) of the vehicle seat (1) in the longitudinal direction (x) of the vehicle seat (1) when the airbag (5, 6) is inflated. [6] Vehicle seat (1) according to claim 5, characterized bythat the side part (7, 8) is coupled by means of the at least one catch element (14, 15, 16, 17, 18) on the one hand to the backrest (3) and on the other hand to a supporting structure (4) of the seat cushion (2) and / or the front part (9, 10) is coupled by means of the at least one catch element (14, 15, 16, 17, 18) on the one hand to the backrest (3) and on the other hand to a supporting structure (4) of the seat cushion (2). [7] Vehicle seat (1) according to claim 6, characterized by that the at least one catch element (16) is coupled to the support structure (4) of the seat cushion (2) in the region of a front edge of the seat cushion (2). [8] Vehicle seat (1) according to claim 6 or 7, characterized by that the at least one catch element (16) branches from the second connection region (23), in which the catch element (16) is coupled to the support structure (4) of the seat cushion (2), to the front part (9, 10) and to the side part (7, 8). [9] Vehicle seat (1) according to one of claims 5 to 8, characterized by in that the vehicle seat (1) has a first airbag (5) and a second airbag (6), wherein the first airbag (5) and the second airbag (6) each comprise a side part (7, 8) and a front part (9, 10), and wherein the first airbag (5) and the second airbag (6) are arranged opposite one another on the seat system in the transverse direction (y) of the vehicle seat (1). [10] Vehicle seat (1) according to claim 9, characterized by that the front parts (9, 10) of the two airbags (5, 6) are coupled to a supporting structure (4) of the seat cushion (2) by means of the same catching element (16). [11] Vehicle seat (1) according to one of the preceding claims, characterized byin that the at least one airbag (5, 6) and / or the at least one catch element (14, 15, 16, 17, 18) are arranged in at least one receiving space (26) which is formed in the backrest (3) of the vehicle seat (1) in an initial state of the airbag device, in which state the at least one airbag (5, 6) is located before the at least one airbag (5, 6) is filled. [12] Vehicle seat (1) according to one of the preceding claims, characterized by in that at least a partial region of the at least one catch element (14, 15, 16, 17, 18) is arranged in a receiving space which is provided within a safety belt (25) of the vehicle seat (1) in an initial state of the airbag device, in which state the at least one airbag (5, 6) is located before the at least one airbag (5, 6) is filled, the safety belt (25) being designed to restrain a seat occupant (12) of the vehicle seat (1).

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