DE10062560A1 - Vehicle pedestrian safety device comprises restrainer wall across vehicle folded out from below bumper as airbag or net for action and folding back down at rest. - Google Patents

Abstract

Support is provided by a restrainer wall (7) which extends from the front bumper to roof height right across the vehicle and is joined to a holder (10) which transfers the wall from rest (6) to support position (9) and holds the wall there. At rest, the wall folds up in the front part of the vehicle below the bumper, only to fold out into the supporting position (9) to form a banana curve convex to the vehicle. After a collision the wall enters its support position with time delay and a secondary airbag system below the bumper includes a single or multiple or one or multi-chambered airbag to act as restrainer wall (7). In a variant, the restraint is offered by means of a net slung out into the supporting position by a pivotally mounted slinger arm. At rest, the arm carries the folded net at one end and is so coupled to a spring arrangement that the carrying part of the arm extends in line off the arm pivot point so the arm as a whole swings upwards simultaneously or with delay. The holder (1) is preferably an inflatable airbag lance (35).

Description

The invention relates to a safety device on a vehicle, in particular on a motor vehicle to protect pedestrians, according to the preamble of Claim 1.

Such safety devices are provided to prevent a collision Vehicle with a pedestrian, a cyclist, etc. to avoid a secondary impact on the road.

A known, generic safety device on a vehicle is from the JP 8 258 668 A known, the one between a bonnet rest position and one Front hood opening position includes swiveling front hood. Also includes this safety device provides a sensor device that can be arranged on the vehicle Detection of an impending or occurring collision as well as one caused by the Sensor device activatable support device in the vehicle front area is arranged and to avoid a sensed collision Secondary impact can be brought from a rest position into a support position.

Specifically, here is the rear bonnet area facing the passenger compartment Airbag arranged in the event of a pedestrian impact on the front hood is inflated. At the same time, the bumper airbag is used in the bumper area trained support device inflated, the secondary impact of the Should avoid pedestrians. The disadvantage of this construction is that the bumper Airbag shown only because of the special bracket can protrude a small edge area over the bonnet top, so that there is a risk that the pedestrian will reverse if the driver reverses the Direction of movement reaches the support device. Furthermore, one such as a bumper airbag designed support device because of the deep Bracket applied forward in the event of a collision, d. H. from the vehicle  away, be suppressed, so that in this regard too, insufficient protection against there is a secondary impact. Next is such a support device only suitable for adults, not for children or small ones Adults who do not regularly respond to a collision with a vehicle Impact the bonnet, but be pushed forward by the vehicle. Overall, such a safety device is therefore not very practical.

A safety device is also known from JP 8 258 667 A, in which at a Pedestrian collision with a vehicle on the front hood of an airbag being inflated. In order to keep the pedestrian on the hood and thus a secondary impact of the Avoiding pedestrians is provided here, in the area of the upper one Window frame cross member or in the area of the lower window frame cross member Provide network arrangement, which after the primary collision from the rear The front end area is slipped over the pedestrian. The disadvantage here is that such a structure in turn only for a collision of the vehicle with a Is designed for adults. Another disadvantage here is that the network arrangement only can then be put over the pedestrian when he is with his body on the Front hood rests, but this is not the case in all impact situations.

Furthermore, a security device is known from US Pat. No. 4,015,870, in which in the area the front edge of the bonnet has a pivoting damping element is provided. In the event of a collision between the vehicle and a pedestrian, through this damping element absorbs energy, the damping element simultaneously is pivoted upwards to raise the pedestrian towards the front hood support. After this pivoting, the damping element remains in one stand in such a raised position that in the front bonnet edge area low edge overhang is formed by the damping element, the one To prevent the pedestrian from sliding off the front hood. With such a there is a risk of low edge overhang formed by the damping element that the pedestrian gets over this, so that there is a secondary impact. Secondary impact protection for children is also not provided here. Furthermore is a such damping element at the front end is not very attractive and requires one visible change in the conventional design and vehicle structure in this Area.

A safety device is also known from JP 103 159 08 A, in which in the case an airbag is deployed in a pedestrian collision with a vehicle. With this airbag  is a C-shaped gripper arrangement coupled to the colliding pedestrian a pedestrian impact on the front hood should grasp and reach around to avoid a secondary impact. Such a structure is, if at all, only for certain impact situations on the front hood are suitable and therefore practical Not very suitable for use. Avoiding a secondary impact in the event of a collision a vehicle with a child is also here for the reasons already mentioned above not possible.

Furthermore, a safety device is known from JP 8 324 380 A, in which In the event of a pedestrian impact, an airbag can be inflated on the entire bonnet, which has additional beads in the vehicle side area in order to avoid a secondary impact to avoid. The pedestrian is only supported on the side, but not in the area of the front bonnet edge. In addition, the ridges are here only relatively low. Another disadvantage is that such a structure again designed only for a collision between the vehicle and an adult is.

From DE-OS 23 39 940 a safety device is known in which a Secondary impact through a swing-out safety catch, which is U-shaped around the Extends in front, should be prevented. Such a safety catch can be coupled to a network to in the swung-open state of the swivel bracket the pedestrian slides between the bonnet and the safety catch avoid. The swinging up of the safety catch is here over one to the Side areas of the vehicle arranged cylinder-piston unit made. On such a structure is unsightly and incompatible with modern design requirements. Another disadvantage is that such a structure in turn only for one Collision of the vehicle with an adult is designed.

A similar structure with a rigid rod is known from DE-OS 26 09 427, at which is arranged in the vehicle front area to avoid a secondary impact pivotable rod is provided. When activated, this rod forms a kind railing on the edge, which is to avoid a secondary impact of the pedestrian. The disadvantage here is that the railing is again relatively low. Here too is in turn only for a collision of the vehicle with one Designed for adults.

It is therefore an object of the invention to provide a safety device on a vehicle, in particular to create a motor vehicle for the protection of pedestrians with which the Risk of a secondary impact can be significantly reduced and with which none current design requirements incompatible intervention in the vehicle body is required.

This object is achieved with the features of claim 1.

According to claim 1, the support device as in the support position in Vehicle front area starting at least approximately from the bumper area at roof level as well as large, roughly the width of the vehicle Retaining wall formed. The retaining wall has at least one holding means connected with which the retaining wall is targeted and guided with predetermined Retaining wall geometry can be transferred to the support position and is stable there.

With such a large retaining wall z. B. with the vehicle collided pedestrians are regularly well absorbed, so there is a risk of Secondary impact can be significantly reduced. At least through that a holding means is achieved that the retaining wall is targeted and guided into a exactly predetermined position can be transferred. In particular, with the at least one holding means also achieves that the retaining wall at one Impact of a pedestrian on this essentially held in their support position so that it cannot be pushed or pushed away, which increases the risk of Secondary impact further reduced.

Furthermore, such a construction of the safety device can be carried out in a simple manner different installation situations adapted for different vehicle types without interfering with modern design requirements To have to make vehicle body. So the retaining wall in one preferred embodiment z. B. formed by a network and / or an airbag in the rest position folded up in the bumper area is stowable and only unfolds over a large area after activation. Through this Adaptability to different vehicle types and the resulting ones Such a construction of the safety device is versatile especially for large series production, as is the case with automobile construction, suitable.  

Furthermore, the retaining wall can have any geometry that can be avoided a secondary impact is suitable. So z. B. lateral in the support position Bumps are provided, which at least partially encompass the front hood laterally.

In a preferred embodiment, the retaining wall is in the rest position folded up in the vehicle front area, preferably in the lower bumper area arranged, while the retaining wall is deployed over a large area in the support position. In addition to the easy integration into existing, conventional Vehicle types are particularly suitable for cramped installation situations compact design of the safety device advantageous.

In a particularly preferred embodiment, the retaining wall is designed that at the beginning of the deployment it is roughly horizontal from the front of the vehicle unfolds away and then unfolds approximately vertically upwards. This will achieved that the retaining wall immediately after the collision with z. B. one Pedestrians first unfolded underneath them and only then upwards erects or unfolds so that the pedestrian is partially enveloped and thereby retracts below, d. H. is shielded from the street. Such a structure is advantageous achieved that especially in children or short adults who have a Collision with the vehicle does not regularly hit the bonnet, the danger a secondary impact can be significantly reduced.

The retaining wall in the support position with one from the vehicle is advantageous away-directed curvature, so that the retaining wall is roughly is banana-shaped. With such a retaining wall geometry, in a particularly simple way the demand for one at the beginning of the development horizontal alignment of the unfolding and the subsequent, approximately achieve vertical unfolding.

In principle, the retaining wall can be removed from the primary collision Rest position are transferred to the support position. In a preferred one The embodiment is the retaining wall after a collision with a Time delay can be brought into the support position. This ensures that the Retaining wall is transferred to the support position at exactly the right time reduce the risk of a secondary impact. In particular, such  Delay can be achieved that the retaining wall is quick and easy as well can be directed upwards under a colliding pedestrian, because at this point in time, which is delayed compared to the impact, the legs of the Pedestrians are regularly lifted off the ground.

The retaining wall can basically be made of all suitable materials and Constructions are formed that are suitable for this. In a first preferred Embodiment, the retaining wall is designed as a network. With such a Net that is simple and inexpensive to manufacture can be a pedestrian easily and be caught safely. In addition, such a network is simple Foldable small, so that a net is particularly suitable for tight spaces Installation situations is suitable, the compact structure of such Require safety device. The network can be advantageous, for example, in the Rest position rolled to be placed under the bumper. Next will be here preferably a close-meshed network is used to prevent tangling of the therein to avoid trapped pedestrians if possible.

The network can, for example, by means of a network centrifugal device Support position are brought, the net spinner one at a Swivel bearing has pivoted mesh sling arm, which in the Rest position is preferably aligned approximately horizontally and preferably on one end carries the net in the folded state. This net fling arm is coupled to an energy store so that a relative to the pivot bearing slidable part of the centrifugal arm supporting the net when activated in approximately linearly displaceable and the slingshot arm at the same time or with a time delay can be pivoted upwards about the pivot bearing. As an energy store here for example, a combined linear spring / torsion spring arrangement or a pyrotechnic structure can be used. Such a structure is easy to manufacture and enables easy and controlled transfer with good functional reliability of the network designed as a retaining wall in the support position.

In an alternative embodiment, preferably in the bumper area below the bumper, at least one secondary collision airbag arrangement be provided, the at least one, which forms the retaining wall, or multi-part and / or single or multi-chamber airbag and at least one single or multi-stage gas generator. With such an airbag device  an impact on the retaining wall through targeted energy absorption of the Airbag collapsing collisions are caught particularly well and gently. In particular, due to the variability of the airbag geometry in connection with Air vents, airbag volume, etc. easy adaptation to the diverse Training options of such a retaining wall possible. So z. B. Lateral or upper airbag beads can be provided, depending on the vehicle situation can also help to avoid the risk of a secondary impact. At the same time, there are various possibilities with such an airbag arrangement, the unfolding of the retaining wall depending on different Set collision parameters. So the airbag z. B. in a multi-chamber or multi-part training separately or together, simultaneously or in succession may be inflated with different gas pressure or by blowing.

In a preferred embodiment, the secondary collision airbag arrangement comprises at least one multi-part airbag, the airbag parts by means of a Network arrangement are connected and / or covered. Combined with such a Building a retaining wall from a network and an airbag arrangement can do that Airbag volume can be reduced overall without sacrificing the benefits of targeted and controlled airbag deployment.

In a specific embodiment, the retaining wall comprises at least one Airbag hose encircling the edge in a U-shape, the free U-leg ends in the activated state of the safety device in the area of the vehicle front end. The free U-leg ends are preferably in the region of the Bumper assembly. When the safety device is activated, Space between the U-base and the U-legs a network arrangement curious; excited. With such a structure of the safety device is a very good and effective restraint of a pedestrian colliding with the vehicle or The like possible, the airbag tube advantageously with a low Gas volume is inflatable.

At least one of the free U-leg ends can be with one in the front end area arranged single or multi-stage gas generator can be coupled. Preferably done here the gas entry via both free U-leg ends.  

In a preferred development of this embodiment, the space between at least one further airbag hose requiring a small gas volume be arranged, which is in a gas connection with the U-shaped airbag hose. However, preference is given here to having a small gas volume Airbag tubes provided, the z. B. bar-shaped perpendicular or transverse to the U- Thighs are aligned. Alternatively, a lattice-shaped or cruciform arrangement of several airbag hoses in the space possible. On such a construction still requires a small gas volume, but here through the additional airbag hose or an additional stabilization of the Retaining wall can be done.

In a further particularly preferred embodiment, the U- shaped airbag hose at least in the area of the U-legs to the side Large capture areas, each by at least one edge circumferential airbag hose are formed with a network arrangement. These catch areas encompass in a preferred embodiment in the activated state Front section at least partially to the side. With such a structure is thus An even more effective restraint is possible thanks to the retaining wall, as well the side front section here at least in some areas from the retaining wall is enveloped, so that the risk of a secondary impact is also significant to the side is reduced.

In a concrete, advantageous embodiment, the one that forms the retaining wall Airbag or airbag section formed by at least one airbag hose, which in the Rest position is curled up in a spiral and preferably by one with each Airbag hose coupled wire is designed so that each of the Airbag hoses when gas flows in under the pedestrian in the direction of unrolled away from the road to the support position.

The holding means can in principle be designed in a wide variety of ways, as long as they are suitable, the retention wall is targeted and guided into the Transfer support position and hold there. In a preferred embodiment the at least one holding means is arranged in the side of the vehicle, wherein preferably at least one holding means is provided on both sides of the vehicle is. By providing several holding devices on each side of the vehicle, which are preferably spaced apart from one another can be achieved with a  Pedestrian impact also due to the holding means assigned to one side as side Restraint means a certain amount of support for the pedestrian to the side is possible if this is necessary. This can further reduce the risk of a secondary collision become. It is particularly advantageous here if there are several holding means on both A network is stretched between these sides of the vehicle.

Alternatively or in addition, the at least one holding means can also be used as inflatable airbag lance. With such an inflatable airbag Lance can also be an advantageous support for the pedestrian to the side surrender. The airbag lance is preferably designed as a fabric hose that extends contracts when inflated. The at least one airbag lance is thereby at least one single or multi-stage gas generator, which is preferably separate a possible gas generator for the retaining wall can be activated, inflatable. It is here, however, a structure is also conceivable in which this airbag lance together with the Retaining wall is activated or inflated.

In a particularly preferred embodiment, this is at least one holding means length adjustable for applying a restraining force and / or a pulling force and / or designed to be displaceable in a vehicle connection point on the vehicle. Advantageously, z. B. the one or more holding means are shortened so that the Retaining wall in the support position is curved banana-shaped and with one upper edge from above at least partially over the bonnet area extends so that the pedestrian is easily shielded. Furthermore, with a Length regulation of the holding means can be achieved that these are tightened if necessary can be so. B. around the retaining wall with a suitable retaining force in the Hold the support position. For example, the holding means can be used with a free one Be coupled at the end to a rotary tensioner and / or a cable pull arrangement, via which a tensile force can be applied to the holding means in the activated state and, if necessary, secured with a backflow protection is durable.

Furthermore, by the length regulation or by the sliding connection also a particularly simple and advantageous guidance of the retaining wall from the Rest position in the support position possible. For a targeted and guided Energy absorption when the pedestrian hits the retaining wall can Holding means can also be made at least partially of an elastic material.  

In a specific embodiment, at least one of the holding means in the vehicle Connection point coupled to a guide link arrangement. This Guide link arrangement comprises a vehicle-fixed and approximately essentially horizontally aligned management backdrop, in which a sliding block between one Home position and an end position is guided. Preferably, the Guide link arranged in the side trim area. The vehicle- Connection point is on the sliding block, the sliding block also with a Energy storage is coupled. For example, here comes as an energy store pyrotechnically ignitable module and / or a torsion spring and / or a spiral spring as Tension or compression spring in question. It is also provided here that when activated Support device simultaneously or with a time delay to the energy storage can be activated so that the sliding block in the guide setting from the basic position in Is movable towards the passenger compartment in the end position. This allows the Support device brought specifically and guided as a retaining wall in the support position and be held there.

To prevent the sliding block from moving back into its final position Moves the basic position back as the starting position, this can be done with a Backstop must be coupled.

In a further advantageous embodiment, on both sides of the vehicle an airbag arrangement is provided as a lateral retaining wall, which is preferably by the lateral holding means is supported on the outside and / or is coupled to it. Alternatively, separate holding means for the airbag arrangement can also be provided his. This further reduces the risk of a secondary impact an advantageous support for the pedestrian to the side. This airbag arrangement can, like any in connection with the safety device according to the invention provided airbag arrangement, basically separately but also with the others Airbag arrangements can be integrally and / or combined, so z. B. with the Secondary collision airbag arrangement, all of them together or separately at least one single or multi-stage gas generator can be controlled.

Furthermore, at least one primary collision airbag arrangement is advantageously provided can optionally be formed integrally with the further airbag arrangements, these Primary collision airbag arrangement at least one or more parts and / or one or multi-chamber primary collision airbag. This primary collision airbag is with a sensor that is preferably sensed or detected by pre-crash sensors  Primary collision can be activated. Such a primary collision airbag arrangement advantageous the pedestrian load in both the primary and secondary impact reduced.

The primary collision airbag preferably comprises a bumper airbag Soft nose and / or a front hood airbag, preferably a front one Hood edge airbag, and / or a disc airbag, individually or in combination are trained and which are separate or together, simultaneously or with a time delay are sequentially inflatable. With a primary collision airbag designed in this way there is an advantageous reduction in the pedestrian load even with one Primary impact.

In a particularly preferred embodiment, at least one partial area can be used of the primary collision airbag when the front hood is activated from the Raise the bonnet rest position to a bonnet impact position. This will the distance between the deformable and energy-absorbing front hood increases underlying, non-deformable vehicle parts, such as. B. one Internal combustion engine, increased, so that an overall larger deformation path to Available. Depending on the vehicle type, the entire front hood can be removed from the Front hood rest position can be raised to the front hood impact position or but also, for example, only the front hood in one of the passenger compartments facing the rear hood area. Overall, therefore with such a structure there is a risk of pedestrian stress both in the primary as well as in the event of a secondary impact.

In a further preferred embodiment, the primary collision airbag is as one one-piece, multi-chamber, arranged folded in the bumper area Combined bumper / bonnet / windshield airbag designed for one Primary collision in a first stage is inflatable in time in front of the retaining wall. This ensures that the bumper / bonnet / window airbag is in the inflated state starting from the bumper area approximately vertically in front of the Vehicle extends upwards and in the event of a pedestrian impact on the Vehicle contour created. It is advantageously achieved that only one in Bumper area arranged airbag assembly is required to cover the entire Cover bumpers, front hood and at least lower pane area. In the case of such an impact, the airbag is advantageously not divided, and thus overall  more stable, with the gas flow and the corresponding valves or chambers Gas pressure can be regulated specifically. This ensures that the airbag as a whole is not inflated too hard and / or too soft.

With the bumper airbag that deploys below the bumper, it becomes advantageous ensures that the leg is supported in a primary collision.

Alternatively, however, a separate bumper airbag and / or can also be used Front hood airbag and / or window airbag can be provided, which are activated State exits via vehicle flaps and are inflatable.

For each airbag arrangement, it is necessary for defined force-displacement identifications that this depending on the sensed impact speed and / or the sensed impact situation are inflatable and possibly with openings as Blow-out openings and / or valve arrangements for regulating the gas pressure are equipped. This can be especially the pedestrian size - and heavy that Position of the colliding pedestrian to the vehicle, in particular the leg position, be taken into account in the development. The same applies to the interpretation of the Sensor technology, in particular with regard to the primary collision measures take into account that this is designed in such a way that the front hood only severe impact is lifted. The triggering of the sensors can z. B. by the previously mentioned pre-crash sensors or by a direct one Front hood edge contact of the pedestrian can be reached.

The invention is explained in more detail with reference to a drawing.

Show it:

Fig. 1 shows a schematic partial and side view of a vehicle in the normal operating state,

Fig. 2 shows a schematic partial and side view of a vehicle with a beginning of the unfolding process horizontally oriented approximately retaining wall,

Fig. 3 shows a schematic partial and side view of a vehicle having already partly upwardly oriented, unfolded retaining wall,

FIG. 4a is a schematic and partial side view of a vehicle with a retaining wall in a supporting position and with retaining means between which a net is strained

FIG. 4b is a schematic and partial side view of a vehicle having held in the supporting position via retaining means retaining wall,

Fig. 4c a schematic partial and side view of a vehicle with a retaining wall in a supporting position and laterally in the region of the retaining means arranged airbag restraint walls,

Fig. 5 is a schematic representation of a multi-part airbag Sekundärkollisions- with a bumper airbag and a rear holding wall,

Fig. 6 is a schematic partial and side view of a vehicle with a grid array as a retaining wall,

Fig. 7 is a schematic representation of a network spinner,

Fig. 8 is a schematic representation of a spirally-rolled airbag tube,

Is a schematic representation of a coupled to a guide link assembly holding means. 9,

An energy storage device coupled to a sliding block FIGS. 10a to 10c each have different embodiments,

Fig. 11 is a schematic partial and side view of a vehicle having an airbag arrangement formed by a retaining wall and a wheel airbag,

Fig. 12 is a schematic partial and side view of a vehicle having an airbag arrangement formed by a retaining wall and with a bumper-air bag, a bonnet air bag, and a wheel airbag,

Fig. 13 is a schematic representation of a primary collision air bag assembly in the deployed state,

Fig. 14, the primary collision air bag assembly according to Fig. 13 in the applied state in connection with a plane formed by a Sekundärkollisions- airbag assembly retaining wall,

Fig. 15 shows a further embodiment of a retaining wall and primary collision arrangement formed by the combination of airbag assemblies,

Fig. 16 is a schematic partial plan view of a further embodiment of a Primärkollisons airbags,

Fig. 17 is a schematic representation of another embodiment of a retaining wall with a surrounding edge side air bag tube and central network arrangement

Fig. 18 is a schematic view corresponding to FIG. 17 with additional bar-shaped airbag tubes in the intermediate space between the two U-legs and the U-base,

Fig. 19 is a schematic view corresponding to FIG. 17 arranged in the space between the cross-shaped additional airbag hoses,

Fig. 20 is a schematic representation of another embodiment of a retaining wall with lateral catching areas, and

Fig. 21 is a schematic perspective front view of a motor vehicle with a further embodiment of a retaining wall with a surrounding edge side air bag tube, and a network arrangement.

A schematic side view of a vehicle 1 is shown schematically in FIG. 1. This vehicle 1 is equipped with a safety device 2 for protecting pedestrians. The safety device 2 comprises a front hood 3 which can be pivoted between a front hood rest position, as shown in FIG. 1, and a front hood opening position, not shown here.

A sensor device 4 is provided at a front end of the vehicle, with which an impending or occurring collision with a pedestrian can be detected. Furthermore, a secondary collision airbag arrangement 5 is arranged in the bumper area, preferably in the area below the bumper, which is not shown in detail here, and which, in the rest position 6 shown in FIG. 1, has one or more parts and / or single or multi-chamber airbag 15 and at least one single-stage or multi-stage gas generator 8 coupled therewith.

The secondary collision airbag arrangement 5 can be activated by the sensor device 4 , so that in the event of a sensed impending or imminent collision of the vehicle with a pedestrian, the airbag 15 to form a retaining wall 7 from the rest position 6 shown in FIG. 1 into a position shown in FIGS. 4a to 4c shown support position 9 can be transferred. In this support position 9 , the retaining wall 7 extends from the bumper area upwards to approximately the roof height and preferably across the width of the vehicle 1 .

As can be seen from FIG. 2, the airbag 15 is deployed approximately horizontally away from the front of the vehicle at the beginning of the deployment. Subsequent to this approximately horizontal deployment, the airbag 15 unfolds, as shown in FIG. 3, with targeted guidance by the holding straps 10 up to the support position 9 shown in FIGS . 4a to 4c, in which the Retaining wall 7 forming airbag 15 is held and / or tightened by the retaining straps 10 so that the retaining wall 7 has an approximately banana-shaped geometry.

The retaining straps 10 are preferably arranged on both sides of the vehicle 1, wherein preferably several of these straps are arranged for targeted guidance of the airbag 15 and thus the retaining wall 7 respectively on both sides of the vehicle 1 10th The retaining straps 10 can be connected in the area of the front bonnet edge and / or in the area of the water tank and / or in the area of the lower window frame cross member on the vehicle side and in a lower retaining wall area and / or an upper retaining wall area in the support position 9 .

The holding straps 10 arranged on both sides of the vehicle 1 also simultaneously provide lateral support to avoid a secondary impact, as is shown schematically in FIG. 4b. The effectiveness of this lateral support can be increased further in that a net 11 is stretched between individual holding straps 10 , as shown in FIG. 4a. The arrangement and design of the network 11 is chosen here only as an example.

In FIG. 4c, in addition to the retaining straps 10 , at least one airbag arrangement 12 is provided as a lateral retaining wall on both sides of the vehicle, which is coupled to the retaining straps 10 or is supported by the latter toward the outside. Alternatively, the airbag arrangement 12 can also be held in its inflated support position by separate holding means.

In FIG. 5 is a more-chambered secondary collision airbag assembly 5 is shown, in addition to the retaining wall 7 forming airbag chamber 15, which is shown only in dashed lines in FIG. 5, additionally comprising an inflatable to a bumper airbag 13 airbag chamber, wherein the bumper Airbag 13 here is a soft nose which preferably extends over the entire front of the vehicle. This bumper airbag 13 can already be activated at the beginning of the collision of the vehicle 1 with a pedestrian, not shown here, in order to provide a damper for the lower leg region of the colliding pedestrian right at the beginning of the collision.

In FIG. 6, the safety device 2 instead of a Sekundärkollisions- airbag assembly includes a secondary collision network arrangement 14, wherein the retaining wall 7 is formed by a network 16. The net 16 can, for example, be transferred to the supporting position 9 by means of a net centrifugal device 17 , as is shown only by way of example and schematically in FIG . This network centrifugal device 17 comprises a network centrifugal arm 18 which is pivotably mounted on a pivot bearing, which is oriented approximately horizontally in the rest position shown in FIG. 7 and carries the network 16 in the folded state at one end. The network centrifugal arm 18 is coupled to a linear spring 19 and a torsion spring 20 such that a part 21 of the network centrifugal arm 18 which is displaceable relative to the pivot bearing and carries the network 16 is displaced approximately linearly by the linear spring 19 in the activated state, during the Net centrifugal arm 18 is pivoted upward at the same time or with a time shift to the pivot bearing 22, which is only shown schematically here, as is shown schematically and by way of example with the arrows. The linear displacement can thereby ensure that the net 16 is transferred upwards into the supporting position 9 under a pedestrian colliding with the vehicle 1 .

FIG. 8 shows an airbag arrangement 23 which forms the retaining wall 7 and which has at least one airbag hose 24 which is rolled up spirally in the rest position shown schematically in FIG. 8 and which is formed by a wire 25 coupled to each airbag hose 24 , that when the gas flows in, each of the airbag tubes 24 , as schematically represented by arrow 26 , unrolls upwards under a pedestrian colliding with vehicle 1 in the direction away from the road, as shown by arrow 27 in FIG. 8 is shown schematically.

In order to transfer the retaining wall 7 from the folded rest position 6 , as shown schematically in FIG. 1, to the support position 9 shown in FIGS . 4a to 4c, 5 and 6, the retaining straps 10 are used as holding means for applying a tensile force adjustable in length on the retaining wall 7 and / or displaceable in the vehicle connection point on the vehicle 1 . For example, at least one of the retaining straps 10 can be coupled with a free end to a rotary tensioner and / or a cable pull arrangement, via which a retaining force and / or a tensile force can be applied to the retaining strap or straps 10 and thus to the retaining wall 7 in the activated state , which is not shown here. For this purpose, the rotary tensioner and / or the cable pull arrangement are preferably provided with a retraction lock.

As can be seen from FIG. 9, one of the retaining strips can at least be coupled to a guide link assembly 28 10, wherein the guide link assembly 28 a preferably arranged in the side moldings area, fixed to the vehicle and includes in approximately horizontally aligned guide slot 29 in the sliding block 30 between a is displaceably guided in FIG. 9 with the basic position shown by solid lines and an end position shown in broken lines in FIG. 9. The holding band 10 shown schematically and by way of example in FIG. 9 is connected with the free end to the sliding block 30 , which in turn is coupled to an activatable spring arrangement 31 as an energy store.

In the event of a sensed collision, the spring arrangement 31 can also be activated at the same time or with a time delay, so that the sliding block 30 in the guide link 29 is shifted from the basic position in the direction of the passenger line into the end position, as a result of which the retaining wall 7 , as shown in FIG. 9, is dashed is drawn, transferred with a desired and predetermined retaining wall geometry into the support position 9 and held there. To prevent the sliding block 30 from moving back from the end position, it is coupled to a backstop.

In FIGS. 10a to 10c are shown alternative embodiments of a coupled with the guide link assembly 28 energy store. In FIG. 10a, the sliding block 30 cooperates with a pyrotechnically ignitable unit 32 in FIG. 10b of the sliding block 30 cooperates with a train-torsion spring 33, and in Fig. 10c, the sliding block 30 acts together as the energy storage with a tension spring 34 . The mode of operation corresponds to that as has been described in connection with FIG. 9, so that this will not be discussed any further.

In the Fig. 11 is a schematic partial and side view is shown of the vehicle 1, in which the retaining wall 7 is formed according to the embodiments of FIGS. 1 to 4 by the retaining wall 7 forming the airbag 15 of the Sekundärkollisions- airbag assembly 5. At least one of the holding straps 10 can, as is shown by way of example in FIG. 11 for only one holding strap 10 , be designed as an inflatable airbag lance 35 .

In addition, a primary collision airbag arrangement 36 is provided here, which comprises an at least one-piece disc airbag 37 . This disc airbag 37 is arranged in the rest position, not shown here, in the folded state in the area of the water tank or the lower window frame cross member and is at a z. B. activated by pre-crash sensors sensed or detected collision of the vehicle 1 with a pedestrian in such a way that the window airbag 37 at the same time the front hood 3 from the bonnet rest position 38 shown in solid lines in FIG. 11 into the rest position 38 shown in FIG . Fronthauben- 11 shown in phantom impact position 39 rises, whereby the distance of the hood 3 to underlying non-deformable parts of the vehicle such. B. an internal combustion engine is increased.

In the event of a primary collision of the pedestrian, in which the pedestrian hits the front hood 3 , targeted energy absorption can thus take place by deformation of the front hood 3 and at the same time by damping via the window airbag 37 . The pedestrian is then caught by the retaining wall 7 .

FIG. 12 shows an alternative embodiment in which, in addition to the window airbag 37 , a front hood edge airbag 40 and the bumper airbag 13 already described in connection with FIG. 5 are provided as a soft nose. As can be seen from FIG. 12, the front hood 3 is lifted here overall by the deployment of the window airbag 37 and the front hood edge airbag 40 . Otherwise, the mode of operation corresponds to that of FIG. 11, so that it is no longer discussed in more detail.

FIG. 13 shows a further alternative embodiment, in which a primary collision airbag 41 is designed as a one-piece and multi-chambered bumper / bonnet / window airbag which is inflatable in front of the retaining wall 7 in a first stage in the event of a primary collision is. In the inflated state, this primary collision airbag 41 extends approximately vertically in front of the vehicle and, in the event of a pedestrian impact, lies against the vehicle contour, as is shown in FIG. 14.

In a further alternative embodiment, a primary collision airbag 42 is provided in FIG. 15, which is constructed from a plurality of separate airbags which emerge in the activated state via flaps arranged on the vehicle and are inflatable above the front hood 3 . As an alternative to this, the primary collision airbag 42 can also be coupled to the secondary collision airbag 5 and activated in time before the latter. The individual airbag chambers can, as can also be seen in particular in FIG. 16, also be covered by a network 43 .

In the Fig. 17 shows a further alternative embodiment of the retaining wall 7 is shown. This retaining wall 7 comprises an airbag tube 44 that runs around the edge in a U-shaped manner, the free U-leg ends 45 , 46 of which , when the safety device 2 is activated, lie in the area of the bumper arrangement of the vehicle front end, which is not shown here, however. The space between a U-base 47 and the U-legs 48 , 49 is here provided with a network arrangement 50 which is tensioned in the activated state of the safety device, which is shown only schematically in FIG. 17. The gas entry into this airbag tube 44 can, as is shown schematically in FIG. 17 by the arrows 51 , take place via the free U-leg ends 45 , 46 of the airbag tube. For this purpose, a single-stage or multi-stage gas generator (not shown here) is preferably arranged in the region of each of these free U-leg ends 45 , 46 .

In Fig. 18 an alternative embodiment is shown, are arranged vertically in the U-base in parallel in the intermediate space in approximately 47, or approximately at the U-legs 48, 49, three bar-shaped additional airbag hoses 52, 53, 54, with the U-shaped airbag hose 44 is in a gas connection.

FIG. 19 shows a further alternative construction, in which instead of the airbag hoses 52 and 53 in FIG. 18, three airbag hoses 55 , 56 and 57 form a lattice-shaped construction in the space between the U-legs 48 , 49 and the U-base 47 is achieved. Here, too, these airbag tubes 55 , 56 , 57 are again in gas connection with the airbag tube 44 and the airbag tube 54 , respectively.

In Fig. 20 an alternative embodiment is further shown in an activated state, having in the central region a U-shaped air bag hose portion, to which the side in the region of the plane formed by the airbag hoses 61, 62 U-legs 63, 64 large capture ranges 58 , 59 connect. The retaining wall 7 here has an airbag tube 60 running around the edge, which forms both the airbag tubes of the lateral catch areas 58 , 59 and the U-base of the U-shaped airbag tube portion and a beam-shaped airbag tube portion extending in the area of the free U-leg ends 65 , 66 . The side catch areas 58 , 59 can, at least partially, encompass the front end area of a vehicle laterally, which is not shown here. A net 67 is stretched between the individual airbag hose sections when the retaining wall 7 is activated.

Finally, FIG. 21 shows a structure in which a U-shaped airbag tube 68 running around the edge is arranged in the lower bumper area and is coupled to a gas generator 69 in the area of the free U-leg end. In this construction, an additional airbag hose 70 running centrally in the intermediate space between the two U-legs is provided. An airbag lance 71 is also schematically provided here as a side airbag for supporting the retaining wall and for intercepting an accident victim who may be slipping laterally from the front hood. A network arrangement 72 is also stretched here between the airbag lance 71 and the airbag hose 68 . This structure can also be coupled with other holding means described above, but this is not shown here. Furthermore, this airbag lance 71 is coupled here to a separate gas generator 73 . The gas generators can be single or multi-stage gas generators.

REFERENCE SIGN LIST

1

vehicle

2nd

Safety device

3rd

Front hood

4

Sensor device

5

Secondary collision airbag arrangement

6

Resting position

7

Retaining wall

8th

Gas generator

9

Support position

10th

Straps

11

network

12th

Airbag arrangement

13

Bumper airbag

14

Secondary collision network arrangement

15

Airbag

16

network

17th

Net spinner

18th

Mesh sling arm

19th

Linear spring

20th

Torsion spring

21

part

22

Swivel bearing

23

Airbag arrangement

24th

Airbag hose

25th

wire

26

arrow

27

arrow

28

Guide link arrangement

29

Leadership backdrop

30th

Sliding block

31

Spring arrangement

32

pyrotechnically ignitable unit

33

Tension torsion spring

34

Tension spring

35

Airbag lance

36

Primary collision airbag arrangement

37

Disc airbag

38

Front hood rest position

39

Front hood impact position

40

front hood edge airbag

41

Primary collision airbag

42

Primary collision airbag

43

network

44

Airbag hose

45

free U-leg end

46

free U-leg end

47

U base

48

U-leg

49

U-leg

50

Network arrangement

51

Arrows

52

Airbag hose

53

Airbag hose

54

Airbag hose

55

Airbag hose

56

Airbag hose

57

Airbag hose

58

Catch area

59

Catch area

60

Airbag hose

61

Airbag hose

62

Airbag hose

63

U-leg

64

U-leg

65

U-leg end

66

U-leg end

67

network

68

Airbag hose

69

Gas generator

70

Airbag hose

71

Airbag lance

72

Network arrangement

73

Gas generator

Claims (32)

1. Safety device on a vehicle, in particular on a motor vehicle to protect pedestrians,
with a front hood which can be pivoted between a front hood rest position and a front hood opening position,
with a sensor device that can be arranged on the vehicle for detecting an impending or occurring collision,
with a support device which can be activated by the sensor device and which is arranged in the front area of the vehicle and can be brought from a rest position into a support position in the event of a sensed collision,
characterized by
that the support device is designed as a large retaining wall ( 7 ) in the supporting position in the vehicle front area starting approximately from the bumper area at least up to approximately roof height and approximately over the vehicle width, and
that the retaining wall ( 7 ) is connected to at least one retaining means ( 10 ) with which the retaining wall ( 7 ) can be transferred from the rest position ( 6 ) to the supporting position ( 9 ) in a targeted and guided manner with a predetermined retaining wall geometry and can be held there. 2. Safety device according to claim 1, characterized in that the retaining wall ( 7 ) is arranged folded in the rest position in the vehicle front area, preferably in the lower bumper area, and that the retaining wall ( 7 ) in the support position ( 9 ) is deployed over a large area. 3. Safety device according to claim 2, characterized in that the retaining wall ( 7 ) is designed such that it unfolds approximately horizontally away from the front of the vehicle at the beginning of the deployment and then unfolds approximately vertically upwards. 4. Safety device according to claim 3, characterized in that the retaining wall ( 7 ) in the support position ( 9 ) with the curvature away from the vehicle ( 1 ) is curved approximately banana-shaped. 5. Safety device according to one of claims 1 to 4, characterized in that the retaining wall ( 7 ) can be brought into the support position ( 9 ) after a collision with a time delay. 6. Safety device according to one of claims 1 to 5, characterized in that the retaining wall ( 7 ) is formed by a network ( 16 ), preferably a close-meshed network. 7. Safety device according to claim 6, characterized in that the network (16) can be brought by means of a power spinner (17) in the support position (9) that the power spinner (17) comprises a pivotably mounted on a pivot bearing net centrifugal arm (18) , which in the rest position is preferably oriented approximately horizontally and which preferably carries the net ( 16 ) in the folded state at one end, and that the net fling arm ( 18 ) with an energy store, preferably a combined linear spring and torsion spring arrangement ( 19 , 20 ), is coupled in such a way that a part ( 21 ) of the network fling arm ( 18 ) which is displaceable relative to the pivot bearing and carries the net ( 16 ) can be displaced approximately linearly in the activated state and the net fling arm ( 18 ) as a whole or simultaneously can be swiveled upwards with a time delay around the swivel bearing. 8. Safety device according to one of claims 1 to 5, characterized in that in the bumper area, preferably below the bumper, at least one secondary collision airbag arrangement ( 5 ) is provided, the at least one, the retaining wall ( 7 ) forming, one or more parts and / or comprises single or multi-chamber airbag ( 15 ; 24 ) and at least one single or multi-stage gas generator ( 8 ). 9. Safety device according to claim 8, characterized in that the secondary collision airbag arrangement ( 5 ) comprises at least one multi-part airbag ( 15 ; 24 ), the airbag parts ( 15 ; 24 ) of which are connected and / or covered by means of a network arrangement. 10. Safety device according to claim 9, characterized in that the retaining wall ( 7 ) comprises at least one peripheral U-shaped airbag tube ( 44 ), the free U-leg ends ( 45 , 46 ) in the activated state of the safety device in the area of the vehicle front end, preferably in the area of the bumper arrangement, and that in the activated state of the safety device, a network arrangement ( 50 ) is tensioned in the space between the U-base ( 47 ) and the U-legs ( 48 , 49 ). 11. Safety device according to claim 10, characterized in that at least one of the free U-leg ends ( 45 , 46 ) is coupled to a single- or multi-stage gas generator ( 69 ) arranged in the front end region. 12. Safety device according to claim 10 or claim 11, characterized characterized in that at least one further airbag hose in the space, preferably a plurality of further airbag hoses cross-shaped and / or grid-shaped and / or bar-shaped and approximately at least partially parallel to the U- Legs and / or the U-base are arranged, the one or those with the U- shaped airbag hose is or are in gas connection. 13. Safety device according to one of claims 10 to 12, characterized in that the U-shaped airbag tube ( 60 , 61 , 62 ) at least in the area of the U-legs ( 61 , 62 ) to the side large-area capture areas ( 58 , 59 ) which are each formed by at least one airbag tube ( 60 ) with a net arrangement ( 67 ) running around the edge. 14. Safety device according to claim 13, characterized in that the catch areas ( 58 , 59 ) in the activated state together with the central retaining wall ( 7 ) at least partially encompass the front end area. 15. Safety device according to one of claims 8 to 14, characterized in that the airbag or airbag region forming the retaining wall ( 7 ) is formed by at least one airbag hose ( 24 ) which is rolled up spirally in the rest position and preferably by one with each airbag hose ( 24 ) coupled wire ( 25 ) is designed such that each of the airbag tubes ( 24 ) unrolls under the pedestrian in the direction of the roadway upward into the support position ( 9 ) when the gas flows in. 16. Safety device according to one of claims 1 to 15, characterized in that the at least one holding means ( 10 ) is arranged in the lateral vehicle area, preferably at least one holding means ( 10 ) is provided on each side of the vehicle. 17. Safety device according to claim 16, characterized in that a plurality of holding means ( 10 ) are provided on both sides of the vehicle, between which a net ( 11 ) can be tensioned. 18. Safety device according to claim 16 or claim 17, characterized in that the holding means ( 10 ) is designed as an inflatable airbag lance ( 35 ; 71 ). 19. Safety device according to claim 18, characterized in that the at least one airbag lance ( 71 ) can be inflated by means of at least one single-stage or multi-stage gas generator ( 73 ). 20. Safety device according to one of claims 1 to 19, characterized in that the at least one holding means ( 10 ) for applying a restraining force and / or a tractive force is adjustable in length and / or displaceable in a vehicle connection point on the vehicle ( 1 ) is. 21. Safety device according to claim 20, characterized in that the holding means ( 10 ) can preferably be produced in partial areas from an elastic material. 22. Safety device according to claim 20 or 21, characterized in that at least one of the holding means ( 10 ) is coupled in the vehicle connection point to a guide link arrangement ( 28 ), that the guide link arrangement ( 28 ) is a vehicle-fixed and approximately horizontally oriented guide link ( comprising 29) which is preferably arranged in the side moldings area that in the guide slot (29) a sliding block (30) is displaceably guided between a starting position and an end position, that the vehicle connecting point is located on the sliding block (30), that the sliding block ( 30 ) is coupled to an energy store ( 31 ; 32 ; 33 ; 34 ) in such a way that when the support device is activated, the energy store ( 31 ; 32 ; 33 ; 34 ) can also be activated simultaneously or with a time delay, so that the sliding block ( 30 ) is in the guide link ( 29 ) from the basic position towards the passenger cell to the end position is slidable and thereby the support device can be brought into the support position ( 9 ) in a targeted and guided manner as a retaining wall ( 7 ) via the holding means ( 10 ). 23. Safety device according to claim 22, characterized in that the energy store is a pyrotechnically ignitable module ( 32 ) and / or a torsion spring ( 33 ) and / or a spiral spring ( 31 ; 34 ) as a tension or compression spring. 24. Safety device according to claim 22 or claim 23, characterized in that the sliding block ( 30 ) is coupled to a backstop. 25. Safety device according to claim 21, characterized in that the holding means ( 10 ) is coupled with a free end to a rotary tensioner and / or a cable pull arrangement, via which a retention force and / or a pulling force on the holding means ( 10 ) and so that it can be applied to the retaining wall ( 7 ). 26. Safety device according to one of claims 16 to 25, characterized in that on both sides of the vehicle ( 1 ) an airbag arrangement ( 12 ) is provided as a lateral retaining wall, which in the activated state preferably through the lateral holding means ( 10 ) to the outside is supported and / or is coupled to these. 27. Safety device according to one of claims 1 to 26, characterized in that at least one primary collision airbag arrangement ( 36 ) is provided, which is optionally formed integrally with the secondary collision airbag arrangement ( 5 ) and / or any further airbag arrangement ( 12 ) provided, and that the primary collision airbag arrangement ( 36 ) comprises at least one single-part or multi-part and / or single-chamber or multi-chamber primary collision airbag ( 13 , 37 , 40 ; 41 ; 42 ), which is preferably sensed by pre-crash sensors detected primary collision can be activated. 28. Safety device according to claim 27, characterized in that the primary collision airbag ( 13 , 37 , 40 ; 41 ; 42 ) has a bumper airbag ( 13 ) as a soft nose and / or a front hood airbag, preferably a front hood edge airbag ( 40 ), and / or a disc airbag ( 37 ), which are designed individually or in combination and which can be inflated separately or together, simultaneously or with a time delay. 29. Safety device according to claim 27 or claim 28, characterized in that at least a portion of the primary collision airbag ( 13 , 37 , 40 ; 41 ; 42 ) in the activated state, the front hood ( 3 ) from the front hood rest position ( 38 ) in one The bonnet impact position ( 39 ), preferably at least in a rear bonnet area facing the passenger compartment. 30. Safety device according to claim 27, characterized in that the primary collision airbag is designed as a one-piece, multi-chambered, in the non-activated state in the bumper area folded together combined bumper / bonnet / window airbag ( 41 ) which is formed in a primary collision a first stage is inflatable in time in front of the retaining wall ( 7 ) in such a way that the bumper / bonnet / window airbag ( 41 ) in the inflated state extends approximately vertically in front of the vehicle ( 1 ) from the bumper area, and that the bumper / bonnet / window airbag ( 41 ) attaches itself to the contour of the vehicle in the event of an impact. 31. Safety device according to claim 27, characterized in that in each case a separate bumper airbag ( 13 ) and / or bonnet airbag ( 40 ) and / or window airbag ( 37 ) is provided as the primary collision airbag ( 36 ) which is provided in the when not activated are folded together in the front section and emerge from the vehicle flaps in the activated state and are inflatable. 32. Safety device according to one of claims 8 to 31, characterized in that each airbag arrangement ( 5 ; 12 ; 23 ; 36 ) for defined force-distance identifications depending on the sensed impact speed and / or the sensed impact situation inflatable and possibly with openings and / or valve arrangements for regulating the gas pressure.