Frontal airbag

Abstract

A frontal airbag for a vehicle occupant has a contact wall (26) facing the vehicle occupant in the inflated state. Inside the airbag, on the contact wall (26), there are arranged pull mechanisms (30, 30') which, in the inflated state of the frontal airbag (10), segmentally hold the contact wall (26) so that the contact wall (26) in the installed, inflated state forms, from the perspective of the associated occupant, a plurality of recesses (32) which extend vertically. Optionally, the frontal airbag (10) can have a first state which is fully inflated and a second state which is fully inflated and has a greater airbag volume than in the first state, wherein at least some of the pull mechanisms (30, 30') are assigned a release device (40) and, when the release device is not activated, the frontal airbag (10) only reaches the first state; and when the release device (40) is activated, the contact wall (26) is further bulged in the direction of the occupant in the region of the released pull mechanisms (30, 30') so that the second state can be achieved.

Description

Technical Field

[0001] The present invention relates to a frontal airbag for vehicle occupants, particularly a front passenger airbag, the frontal airbag having a contact wall facing the vehicle occupant in an inflated state, the contact wall having an upper edge, a lower edge and two side edges, wherein a traction mechanism is disposed inside the airbag and on the contact wall, the traction mechanism pulling the contact wall in segments when the airbag is inflated. Background Technology

[0002] This type of airbag is known from DE 10 2015 004 956 A1. In this type of airbag, the bulges formed by the recesses are of different sizes, so that the side bulges extend closer to the occupant than the central bulges, in order to hold the vehicle occupant in the event of an oblique impact. Summary of the Invention

[0003] The purpose of this invention is to further improve known frontal airbags.

[0004] This is achieved through a frontal airbag for vehicle occupants, particularly a front passenger airbag, wherein the airbag has a contact wall facing the vehicle occupant in its inflated state. This contact wall has an upper edge, a lower edge, and two side edges. A traction mechanism is disposed within the airbag and on the contact wall. This traction mechanism, in the inflated state, pulls the contact wall in segments, causing the contact wall to form multiple vertically extending recesses from the perspective of the relevant occupant in its installed, inflated state. The frontal airbag has a first fully inflated state and a second fully inflated state, the second state having a larger airbag volume than in the first state. At least some of the traction mechanisms are assigned a release device, and when the release device is not activated, the frontal airbag only reaches the first state; and when the release device is activated, the contact wall further bulges towards the occupant in the area of ​​the released traction mechanism to achieve the second state. In the frontal airbag according to the invention, in both the first and second states, a plurality of vertically extending recesses are formed on the contact wall in the installed, inflated state, as viewed from the perspective of the relevant occupant. This ensures that the contact wall also has a plurality of vertically extending recesses in the second state. This allows the contact wall to move laterally synchronously in both the first and second states when the occupant encounters it, because the plurality of recesses and the protrusions formed between the recesses provide additional airbag wall material.

[0005] As recent studies have shown, recesses create the potential for contact walls in adjacent contact areas to tighten upon head impact, as the head sinks into these areas. In current frontal airbags, which are largely devoid of significant recesses, the head is "held" on a generally non-curved airbag surface upon impact, thus allowing head rotation. This is because a non-curved surface lacks the potential for lateral, synchronized movement with a head impacting it at an angle. With this invention, the area of ​​the contact wall (on which the occupant contacts) can move laterally and synchronized due to the addition of additional airbag wall material, thereby reducing head rotation. The release mechanism allows at least one pulling mechanism to either keep the contact wall closer to the front of the vehicle, resulting in a smaller airbag volume, or, when the release mechanism is activated, to further direct the contact wall towards the rear of the vehicle and thus further towards the occupant, resulting in a larger airbag volume. In both states, the contact wall has multiple recesses extending vertically from the perspective of the relevant occupant.

[0006] If the occupants are seated extremely far back or the backrest is already reclined very far (which is important, for example, in future autonomous driving), then a larger volume is particularly relevant to safety. Thus, the driver or front passenger sits further back in a more comfortable position or the backrest is reclined even further. In this comfortable position, the frontal airbag according to the invention provides optimized protection due to its optionally larger volume.

[0007] Preferably, the protrusions between the recesses also extend vertically and / or parallel to each other, for example, across the entire height of the airbag. Alternatively, the protrusions between the recesses may extend only across a portion of the height of the airbag. These parameters also relate to an installed, inflated airbag. The multiple recesses and protrusions between them are particularly arranged only in the area of ​​the contact wall, and therefore on the occupant-associated side of the airbag.

[0008] The release device can either release or destroy at least one traction mechanism relative to the anchor. Alternatively, the length of the traction mechanism can be increased by the release device.

[0009] The release device includes or is composed of an electrically operable actuator, such as a pyrotechnic actuator, which is electrically actuated.

[0010] Multiple traction mechanisms can also be assigned a single release device so that they can be released together. This saves on the cost of additional release devices.

[0011] Here, inside the airbag, multiple traction mechanisms, each with its own recess, originating from the contact wall, can be merged into a single traction mechanism. This traction mechanism then extends towards the rear of the airbag. The release device then engages with this individual traction mechanism. In other words, in the deployed state of the airbag, the traction mechanisms extend in a forked manner towards the rear wall so that they can subsequently be unified into a single traction mechanism.

[0012] Preferably, the contact wall is composed of multiple strip-shaped cut sections connected to each other and extending vertically when the front airbag is inflated. These cut sections are connected to each other, particularly by stitching, at their longitudinal edges. A traction mechanism can also be mounted on the contact wall in the connection area, for example, by securing the cut sections to the contact wall via the same seam that fastens them together.

[0013] At least some of the cut sections, preferably the middle cut sections, are longer in the vertical direction than in the width direction; that is, these cut sections are strip-shaped. This definition also applies to the installed, inflated state of the airbag.

[0014] Preferably, each cut section defines a protrusion of the airbag.

[0015] To simplify airbag manufacturing and minimize seams, some cutouts, preferably all cutouts, may extend continuously from the upper edge to the lower edge of the airbag. It is important to emphasize that, in this context, the upper and lower edges, as well as the side edges, of the contact wall cannot be defined as the angular ends of the airbag within the contact wall area, because the edges transition into the rear wall to which the contact wall is connected with rounded corners. The upper and lower edges, as well as the side edges, are always associated with the installed, inflated state as seen from the perspective of the relevant occupant.

[0016] At least some, and preferably all, of the cut portions can be fastened to the rear wall in the region of the upper and lower edges. Thus, the cut portions together form a contact wall, while these cut portions do not necessarily form the rear wall. Therefore, the contact wall and the rear wall can be formed very independently of each other in terms of geometry.

[0017] In another embodiment, a contact wall formed by cut-out portions is arranged in a recessed area at the front of the airbag's front wall. Here, the edges of the contact wall formed by the cut-out portions are particularly fastened to the front wall. In the first state, the contact wall is formed by the cut-out portions and the front wall. In the second state, where the traction mechanism is released by the release device, the contact wall is essentially formed only by the cut-out portions, which then further expand towards the occupant. In this embodiment, the cut-out portions in the second state contribute to the inflation of the airbag, which in particular takes the form of wrap-like protrusions "placed" on the front wall. Here, the contact wall in the second state also has protrusions between the recesses. Furthermore, by changing the size of the cut-out portions, the depth of the "placed" wrap-like protrusions can be easily changed, and thus the volume and size of the frontal airbag in the second state can be altered.

[0018] To increase the potential expansion of the front airbag in the longitudinal direction of the vehicle in the second state, the edge of the contact wall formed by the cut-out portion can be fastened to at least one additional wall element. In this embodiment, the at least one additional wall element is preferably fastened to the front and / or rear wall of the front airbag with an edge opposite to that of the contact wall. A traction mechanism can also be arranged on the at least one additional wall element, which can be released by a release device.

[0019] By changing the size of this additional wall element, the depth of the airbag in the second state can be easily altered, and thus its volume can be changed. Consequently, this airbag can be easily adapted to different seat adjustment ranges in the vehicle, where the vehicle seat, depending on the implementation, can be adjusted rearward by different distances, for example. In particular, in the second state, the depth of the front airbag (which describes the expansion of the front airbag in the direction toward the occupant) can be increased with a smaller increase in airbag volume compared to prior art front airbags.

[0020] Since only the cut-out portion and / or additional wall elements need to be adapted to change the size of the front airbag, and the rear wall does not need to be adapted, the size of the front airbag in the second state can be adapted in a simple way without affecting / adapting the entire airbag geometry.

[0021] To form the recess, it is advantageous that at least some, preferably all, of the cut portions have upper and lower ends that are narrower in the horizontal direction than the intermediate region between these ends. To define this geometry of the cut portions, they are designed to be flat in a non-connected state, with the upper edge facing upwards and the lower edge facing downwards.

[0022] In this configuration, at least some, preferably all, of the cut portions bulge laterally outward in the central region. Adjacent cut portions are connected to each other, preferably sewn together, in the edge regions of the bulges. Additional material is thus used to implement these recesses.

[0023] The recesses have different depths relative to the envelope of the contact wall. Preferably, the recesses are designed such that they become progressively deeper in the middle region, starting from the upper and lower ends.

[0024] In order to achieve the aforementioned advantages in the restrained state by means of additional airbag material on the contact wall in the second state, the contact wall optionally also has a vertically extending recess in the second state.

[0025] In the second state, these vertically extending recesses are particularly formed at the seams between the strip-shaped, vertically extending cut sections of the contact wall. The recesses can be created by the cut shape. Alternatively, in the second state, the recesses can also be formed by a tensioning mechanism.

[0026] For oblique impacts, it is advantageous that the contact wall, with the airbag inflated and installed, forms a vertically extending, elongated protrusion at one of its side edges, the horizontal width of which is greater than the horizontal width of the remaining protrusions formed between adjacent recesses. This elongated, excessively wide protrusion is preferably defined relative to the rest of the contact wall by a traction mechanism implemented without a release device, thereby ensuring that the excessively wide, lateral protrusion remains uniformly large.

[0027] The back wall can be a one-piece cut section.

[0028] At least one pulling mechanism may be designed and connected to the release device such that the pulling mechanism has a greater working length after release and is further pulled in a second state to create at least one recess on the contact wall.

[0029] The traction mechanism, especially the straps. These straps can be fastened to the rear wall, or to the reinforcement layer in the area of ​​the inflation port or in the area where the airbag is fastened to the module or gas generator.

[0030] The frontal airbag according to the invention has at least two, particularly three, recesses and correspondingly at least three, preferably four, protrusions that extend generally vertically.

[0031] The protrusions can be of varying widths (in the installed and inflated state), especially the lateral cut sections can have protrusions that are wider than the central cut sections. Attached Figure Description

[0032] Other advantages and features of the invention will become apparent from the following description and the following drawings, with reference to these drawings. In the drawings: - Figure 1 A simplified schematic top view of the frontal airbag according to the invention, which is divided into horizontal sections according to a first embodiment, in a first state after being installed and inflated. - Figure 2 It shows according to Figure 1 A simplified schematic top view of the frontal airbag according to the invention, in its second state of installation and inflation, comprising horizontal sections. - Figure 3 It shows according to Figure 1 and Figure 2 The cut portions of the contact wall and rear wall of the airbag according to the present invention. - Figure 4 A simplified schematic top view of the frontal airbag according to the invention, which is horizontally segmented according to a second embodiment, in a first state after installation and inflation is shown. - Figure 5 It shows according to Figure 4 A simplified schematic top view of the frontal airbag according to the invention, in its second state of installation and inflation, comprising horizontal sections. - Figure 6 A simplified schematic front view of the frontal airbag according to the invention, based on a third embodiment, in its inflated state is shown. - Figure 7 It shows according to Figure 6 A simplified schematic side view of the front airbag in its second state, which is installed and inflated. Detailed Implementation

[0033] Figure 1 The image shows the frontal airbag 10, more specifically, the passenger-side frontal airbag. It is shown from above in its installed, fully inflated, horizontally segmented state. The vehicle's longitudinal direction (in the direction of travel) has a coordinate x, and the vehicle's lateral direction (in the horizontal direction) has a coordinate y. The vertical direction has a coordinate z.

[0034] Crew member 12 is shown with his head 14 and upper body 16.

[0035] The airbag 10 is part of the airbag module 18, which is symbolically shown by dashed lines and is mounted in or below the dashboard and separates from it. The module housing has reference numeral 22. A gas generator 24 is housed within the module housing, by means of which the airbag 10 is inflated.

[0036] In the folded state, the airbag 10 is fully housed in the module housing 22.

[0037] It should be emphasized that the gas generator 24 can be a single-stage gas generator or a multi-stage gas generator having one or more outlet openings spaced apart from each other. Alternatively, there can be multiple gas generators 24.

[0038] The airbag 10 has an outer wall with multiple sections and areas, the area facing the vehicle occupant 12 being referred to as the contact wall 26. The wall opposite the contact wall 26 is the rear wall 28. This rear wall 28 faces the dashboard and the windshield.

[0039] The rear wall 28 is the wall that is fastened to the side of the airbag module and used to lock the airbag 10 onto the vehicle when it is inflated.

[0040] Inside the airbag 10 are multiple tethering mechanisms 30, 31 in the form of straps. These tethering mechanisms 30, 31 are fastened at one end to the rear wall 28, or to the module housing 22, or to the part connected thereto.

[0041] The opposite ends of each traction mechanism 30 are fastened to the contact wall 26, ensuring that the contact wall 26 can move unimpeded in the inflated direction toward the occupant 12 within the fastened area. Multiple recesses 32 and convex, occupant-facing protrusions 34, 35 are formed between these recesses 32 by means of the traction mechanisms 30, 31.

[0042] These protrusions 34 and 35 extend generally vertically in the installed, inflated state. Depending on the available airbag material between adjacent recesses 32, the protrusions 34 and 35 can achieve [specifications related to airbag material]. Figure 1 The curves shown in the diagram are arc-shaped in the cross-section. If there is more or less airbag material, the protrusions 34 and 35 can arch more or less forcefully.

[0043] Here, the larger protrusion 35 is the protrusion 35 on the left side from the perspective of the occupant 12. This protrusion is also the protrusion 35 of the airbag 10 that ends towards the driver sitting on the left. This protrusion is laterally defined and formed by the traction mechanism 31.

[0044] Optionally, and not necessarily, the protrusion 35 on the left (more precisely, the protrusion 35 toward the adjacent vehicle occupant) may extend further in the x-direction, and thus have a greater horizontal width than the remaining protrusions 34, in order to provide an additional barrier against lateral slippage.

[0045] In addition, if it can be obtained from Figure 1 As a result, the pulling mechanisms 30 extend towards each other at their respective ends toward their module sides and merge into a common pulling mechanism 30', wherein this common pulling mechanism 30' can be, for example, a separate part, or it can be, for example, an intermediate pulling mechanism 30 on which the outer pulling mechanism 30 is disposed. Here, the common pulling mechanism 30' can be of any type.

[0046] An electrically operable release device 40 is provided in the area where the pulling mechanism 30' is secured to the module side. This release device 40 may have an electrically operable actuator 42, such as a pyrotechnic actuator, which is activated by an electrical signal from the vehicle controller or airbag controller. In the case of the invention, the actuator 42 operates a cutting device 44, which, when activated, can destroy the pulling mechanism 30' in the area of ​​the module housing 22. According to... Figure 1 and Figure 2 In this embodiment, each traction mechanism 30 is assigned a single release device 40 so that these traction mechanisms can be released together. Of course, it is also possible to assign multiple separate release devices to each traction mechanism 30.

[0047] If the occupant's position is normal (i.e., not sitting too far from the dashboard and the backrest is not adjusted to be flat), then proceed with... Figure 1 The first state shown is when the release device 40 is not activated and is under restraint.

[0048] However, if occupant 12 is seated relatively far from the dashboard and / or the occupant has adjusted their seatback to be very flat (e.g., due to autonomous driving), then, in time, with the activation of gas generator 24, shortly before activation, or immediately after activation, the release device 40 is also activated, causing all the straps 30 to lose their fastening on the module side. Thus, the airbag 10 has a larger volume, which is as if in Figure 2 As shown in the document.

[0049] This larger volume is used to shift the contact wall 26 in the direction toward the rear of the vehicle. At least partially losing its basis. Figure 1 The recess 32 is such that the airbag material present in the form of the recess 32 can bulge in the direction toward the occupant. Figure 1 and Figure 2 The comparison shows that a wrap-like protrusion 46 is generated, which causes the contact wall 26, in addition to the protrusion 35, to be further displaced toward the tail.

[0050] Optionally, the contact wall 26 in the second state may also have recesses 32, which are created by cutting the airbag 10 and possibly also by the straps 30 that are connected to each other.

[0051] Figure 3 Cutouts 50, 52, 54, and 56 are shown, defining wrap-around protrusions 46. All cutouts 50-56 are made of airbag fabric material and have an elongated, strip-like shape. This elongated shape means that cutouts 50-56, when the airbag 10 is installed and inflated, have a larger dimension in the z-direction than in the y-direction.

[0052] With regard to the airbag 10 being installed and inflated, the cut-out portions 50-56 further have: upper and lower edges 58 or 60, wherein these edges 58, 60 define the upper or lower end of the respective cut-out portion; and a longitudinal edge 62, at which the cut-out portions 50-56 are correspondingly wider than in the areas of the upper and lower edges 58, 60. A bulge 64 is formed in the intermediate region between the so-called upper and lower ends; for clarity, these bulges are indicated only on the cut-out portion 52.

[0053] The additional fabric material required for the recess 32 is provided by these bulges 64. Adjacent cut portions 50-56 are sewn together on the longitudinal edge 62. For the protrusion 35, there is an additional (not shown) cut portion sewn to the cut portion 56.

[0054] The back wall 28 is composed of a one-piece cut-out section.

[0055] Preferably, the ties 30 are secured to the contact wall 26 by also sewing adjacent longitudinal edges 62 into the same seam.

[0056] The rear wall 28 forms a bag-shaped geometry, wherein the "bag" is open on the front side and closed by the contact wall 26. Thus, the contact wall 26 has an upper edge and a lower edge formed by the combination of the cut-out portions 50-56 and the edges 58, 60 of the cut-out portions for the protrusion 35. Furthermore, the contact wall 26 has side edges 80, 82, which are formed by the opposing longitudinal edges of the cut-out portions 50 and the cut-out portions for the protrusion 35.

[0057] Cut sections 50-56, when the airbag 10 is inflated, extend vertically and continuously, like recess 32, across the entire front of the airbag (i.e., from the upper edge of the "bag" to the opposite lower edge). Edges 58 and 60 are sewn to the upper or lower edge of the "bag". Lateral cut sections 50 and cut sections for protrusions 35 are sewn to the side edges of the "bag" at their opposite longitudinal edges.

[0058] according to Figure 4 and Figure 5 The implementation methods are the same as those according to the following: Figure 1 and Figure 2 The implementation methods correspond to those already introduced, so the reference numerals can be retained and only the differences will be discussed below.

[0059] The difference in this embodiment is that, compared to the first embodiment, the pulling mechanism 30' is not completely released on the module side, but rather its effective length is increased more precisely by activating the release device 40. This means that the pulling mechanism 30' is always under tension in the second state, resulting in a deeper recess 32 than in the first embodiment.

[0060] The traction mechanism 30' is designed, for example, as a multi-piece structure with a bridging section 30'', which is only stretched in the second state and forms a loop in the first state. The section 130 bridging by the loop is then released on the module side by the release device 40, for example, by cutting.

[0061] Naturally, and quite commonly, the release device may also be used to release or break the fastening of the traction mechanism 30'. For example, the traction mechanism 30' may have a loop on the module side through which a bolt extends, and this bolt is broken or displaced by the release device 40, thereby abruptly releasing the fastening on the module side.

[0062] Figure 6 and Figure 7 A third embodiment of the frontal airbag 10 is shown. According to... Figure 6 and Figure 7 The implementation method differs from that according to only a few features Figure 1 and Figure 2 as well as Figure 4 and Figure 5 The implementation methods differ, so the reference numerals already introduced can be retained and only the differences will be discussed below.

[0063] Unlike the first and second embodiments, the cut portions 50-56 do not extend from the upper edge to the lower edge of the airbag 10. Figure 6(The figure shows a front view of the airbag 10 in the longitudinal direction x of the vehicle, i.e., a front view of the airbag 10 from the perspective of a vehicle occupant.) It is evident that the cut-out portion extends from the lower edge 84 to the upper edge 86 of the recess in the front wall 90. The contact wall 26 in the first state is composed of the cut-out portions 50-56 and the front wall 90. In the illustrated embodiment (as shown from...), the front wall 90... Figure 7 (It is concluded that) it connects with the posterior wall 28 at the lateral edge 80', especially through suturing.

[0064] Figure 7 A side view of the airbag 10 in a second, installed and inflated state is shown, in which the airbag 10 is positioned between the dashboard 70 and the windshield 72.

[0065] The contact wall 26 is formed by the protrusions 34 of the cut portions 50-56. To allow the wrap-around protrusions 46' to expand further toward the occupant, the airbag 10 includes additional wall elements 92 and 94. In this embodiment, the edge of the contact wall 26 formed by the cut portions 50-56 is fastened to the additional wall elements 92-94. The additional wall elements 92-94 are further fastened to the side edge 85 and the lower edge 84 and upper edge 86 of the recess in the front wall 90. This wrap-around protrusion 46' enhances the inflation of the airbag 10 in the second state, while simultaneously maintaining a smaller additional volume compared to airbags in the prior art. In particular, the inflation of the airbag 10 can be easily varied by adapting the additional wall elements 92 and 94.

[0066] In this embodiment, the pulling mechanism 30' is not completely released on the module side, but the effective length of the pulling mechanism 30' is increased by activating the release device 40. This means that the pulling mechanism 30' is always under tension in the second state, thus making the recess 32 deeper even in this embodiment than in the first embodiment.

[0067] The traction mechanism 30' is also designed as a multi-piece unit with a bridging section 30'', which is only pulled in the second state and forms a loop in the first state. In the illustrated embodiment, a loop 29 is arranged on the traction mechanism 30' at its module-side end (where the bridging section 30'' connects to the traction mechanism 30'), which is held by the release device 40 in the first state (not shown). In the illustrated embodiment, the release device 40 is integrated into or arranged in the gas generator 24, or integrated into or arranged on the gas generator. In the first case (not shown), the loop 29 is held, for example, by a bolt of the release device. In the second case, the loop 29 is released by activating the release device, and thus the traction mechanism 30' is released, and the wrap-around protrusion 46' can cause the airbag 10 to enlarge toward the rear of the vehicle and thus toward the occupant.

Claims

1. A frontal airbag for a vehicle occupant, the frontal airbag having a contact wall (26) facing the vehicle occupant in an inflated state, the contact wall having an upper edge, a lower edge, and two side edges (80, 82), wherein a pulling mechanism (30, 30') is disposed inside the airbag and on the contact wall (26), the pulling mechanism pulling the contact wall (26) in segments in the inflated state of the frontal airbag (10), thereby causing the contact wall (26) in the installed and inflated state to form a plurality of vertically extending recesses (32) from the perspective of the relevant occupant, characterized in that, The front airbag (10) has a first fully inflated state and a second fully inflated state, the second state having a larger airbag volume than in the first state, wherein a release device (40) is assigned to at least some of the traction mechanisms (30, 30'), and when the release device is not activated, the front airbag (10) only reaches the first state; and when the release device (40) is activated, the contact wall (26) further bulges toward the occupant in the region of the released traction mechanism (30, 30') to enable the second state to be achieved. In the first and second states, a plurality of recesses (32) extending vertically from the perspective of the relevant occupant are formed, in the installed and inflated state, so that the contact wall (26) also has a plurality of vertically extending recesses (32) in the second state, wherein the contact wall (26) is formed by combining a plurality of strip-shaped cut portions (50-56) connected to each other and extending vertically in the inflated state of the front airbag (10), the cut portions being connected to each other at their edges, and the traction mechanism (30) being disposed in the connecting area of ​​adjacent cut portions (50-56).

2. The frontal airbag according to claim 1, characterized in that, The frontal airbag is the passenger airbag.

3. The frontal airbag according to claim 1 or 2, characterized in that, The plurality of recesses (32) and the protrusions (24) formed between the recesses (32) are arranged only in the area of ​​the contact wall (26) of the front airbag (10).

4. The frontal airbag according to claim 1 or 2, characterized in that, The release device (40) has an electrically operable actuator (42).

5. The frontal airbag according to claim 4, characterized in that, The actuator (42) is a pyrotechnic actuator.

6. The frontal airbag according to claim 1 or 2, characterized in that, A release device (40) is assigned to a plurality of pulling mechanisms (30, 30') so that the plurality of pulling mechanisms can be released together.

7. The frontal airbag according to claim 6, characterized in that, Inside the frontal airbag (10), a plurality of traction mechanisms (30) originating from the contact wall (26) merge into a single traction mechanism (30'), which extends toward the back of the airbag and the release device engages with the traction mechanism.

8. The frontal airbag according to claim 1, characterized in that, At least some of the cut sections extend continuously from the top edge to the bottom edge.

9. The frontal airbag according to claim 8, characterized in that, All cut sections (50-56) extend continuously from the top edge to the bottom edge.

10. The frontal airbag according to claim 8 or 9, characterized in that, At least some of the cut portions are fastened to the rear wall (28) in the region of the upper edge (58) and the lower edge (60).

11. The frontal airbag according to claim 10, characterized in that, All cut sections (50-56) are fastened to the rear wall (28) in the area of ​​the upper edge (58) and the lower edge (60).

12. The frontal airbag according to claim 1 or 2, characterized in that, The edge of the contact wall (26) formed by the cut-out portions (50-56) is fastened to the front wall (90) and / or fastened to at least one additional wall element (92, 94).

13. The frontal airbag according to claim 1, characterized in that, At least some of the cut portions have an upper end and a lower end, which are narrower than the intermediate region between the ends; and at least some of the cut portions have bulges (64) pointing in opposite directions in the intermediate region.

14. The frontal airbag according to claim 13, characterized in that, All cut portions (50-56) have an upper end and a lower end, which are narrower than the intermediate region between the ends; and at least some cut portions have bulges (64) pointing in opposite directions in the intermediate region.

15. The frontal airbag according to claim 14, characterized in that, All cut sections (50-56) have bulges (64) pointing in opposite directions laterally in the middle region.

16. The frontal airbag according to claim 12, characterized in that, In the second state, the vertically extending recess (32) is formed at the stitching position between the strip-shaped, vertically extending cut portions (50-56) of the contact wall (26).

17. The frontal airbag according to claim 1 or 2, characterized in that, With the front airbag (10) inflated and installed, the contact wall (26) forms a vertically extending, elongated protrusion (35) at one of the side edges of the contact wall, the horizontal width of which is greater than the horizontal width of the remaining protrusions (34) formed between adjacent recesses (32).

18. The frontal airbag according to claim 1 or 2, characterized in that, A back wall (28) is provided, which is designed as a one-piece cut-out section.

19. The frontal airbag according to claim 1 or 2, characterized in that, At least one of the pulling mechanisms (30') has a greater working length after release and is pulled in the second state to create at least one recess (32) on the contact wall (26).

Images