DE102004028513A1 - Safety installation for a motor vehicle has airbag folded in inactive state in fastening area and unfolded in inflation area, with deformable airbag guide ramp which emerges from airbag inflation area with airbag in a crash - Google Patents

Abstract

The safety installation (2) has an airbag (3) which in its inactive base state is folded in base position to an airbag fastening area (1) and which when the safety device is activated unfolds into its functional position in an airbag inflation area. An airbag guide ramp (4) is fixed onto this area by which means the airbag can be led around the adjacent part (12) during the inflation process. When the airbag is activated, the airbag guide ramp comes out of the airbag inflation area with the adjacent part to which it is coupled. In a crash the airbag guide ramp deforms by energy absorption.

Description

The The invention relates to a safety device for a vehicle, in particular for a Motor vehicle, according to the preamble of claim 1.

One from the DE 298 03 985 U1 known, generic safety device for a motor vehicle has at least one airbag, which is arranged in a non-activated basic state in a folded airbag basic position on an airbag connection area fixed to the vehicle. When the safety device is activated, the airbag unfolds from the airbag connection region into an airbag functional position into an airbag inflation region. In addition, at least one arranged in the airbag inflating airbag-Leitrampe is provided, by means of which the airbag in the course of Aufblasvorgangs around an adjacent component is guided around.

Concrete the airbag is formed by a side airbag, which is in the airbag basic position on a roof rail area of the motor vehicle as an airbag connection area is arranged. Upon activation of the safety device The side airbag unfolds starting from the roof spar area in the direction of Vehicle floor along an inside of the roof spar area associated side structure of the motor vehicle. There are also guying devices provided, on the one hand with the side airbag and on the other with a C-pillar the side structure of the motor vehicle are connected. At the C-pillar is a pillar trim provided in the assembled state to the side airbag in the Airbag basic position adjacent as adjacent component. To the side airbag in the course of its deployment at the pillar trim towards Forwarding the vehicle interior is an airbag skid ramp adjacent to the roof spar area Side airbag provided. The airbag Leitrampe is seen in cross section L-shaped constructed, with a first L-leg is arranged on the roof rail area fixed to the vehicle and the second L-leg From the roof rail area, starting in the direction of the vehicle interior. This is indeed ensured by the second L-leg, that the side airbag as it unfolds around the pillar trim around in the direction of the vehicle interior and thus in the airbag inflation area can be directed, but by the direction of the vehicle interior in particular protruding from the roof spar region second L-leg in terms of a head impact in this area a deformation technically unfavorable Component is created.

Furthermore, both in the DE 100 00 768 A1 as well as in the DE 101 15 063 A1 each shown a side airbag, which is arranged fixed to the vehicle in the roof rail area of the motor vehicle in the airbag basic position. The side airbags are each arranged behind a wall region of a vehicle headliner that this can be folded accordingly in the course of deployment of the respective side airbags for release of an airbag passage opening, so that unimpeded deployment in the airbag inflation area is possible.

task the invention is a safety device for a vehicle, especially for one Motor vehicle to create, by means of an airbag Leitrampe on the one hand a functionally reliable deployment of an associated airbag possible on the other hand, in the event of a collision in the area of the airbag guide ramp an optimal protection potential for the Impact is given.

These The object is achieved with the features of claim 1.

According to claim 1, the airbag guide ramp is designed as a deformation element, which is mechanically coupled to the adjacent component. At a airbag-induced force is the airbag-Leitrampe together with the adjacent component out of the air bag inflation area displaceable, wherein in an impact force due to the impact Airbag Leitrampe is deformed under energy absorption.

Advantageous in such a safety device for a vehicle is that by the formation of the airbag Leitrampe ensured as a deformation element is that during the deployment of the associated airbag this is reliably passed around the adjacent component, but with at the same time in an impact on the airbag Leitrampe this under energy absorption deformed, so that thus an optimized protection potential for the impacting ends given is. In the course of deployment of the airbag, the Airbag Leitrampe deform at least partially, with each to Time is ensured that the airbag around the adjacent Component due to the mechanical coupling with the airbag baffle upon deformation thereof from the airbag inflating area is shifted, is shifted around. This is a functionally reliable Unfolding in the airbag inflation of the airbag possible.

In a preferred embodiment, the airbag and the airbag Leitrampe can be arranged in a vehicle interior of the vehicle. This occupant protection is given by means of the airbag in the airbag functional position, the air Bag-Leitrampe so the airbag is assigned, that in the course of deployment of the airbag, this can be reliably transferred due to the airbag barrier in the airbag operating position. In principle, the airbag could also be arranged on a vehicle outer side, for example as a pedestrian protection airbag, in which case the airbag guide ramp could then likewise be arranged on the vehicle exterior.

In a concrete embodiment For example, the airbag may serve as a side airbag on a roof rail area as an airbag attachment area be arranged. The adjacent component can be replaced by a trim part, in particular by a pillar trim part be formed in the assembled state with a trim part edge edge region points in the direction of the roof spar area. The side airbag is at a Activation of the safety device starting from the roof spar area deployed in the direction of the vehicle floor in the airbag inflatable area. It can the side airbag, for example, adjacent to a B-pillar Dachholmbereich be arranged so that the side airbag in the side airbag basic position adjacent the pillar trim part of the B-pillar. By means of the airbag-Leitrampe it is ensured that the side airbag in the course of deployment around the trim part marginal edge area of the pillar trim part can be deployed around in the airbag inflator. by virtue of the mechanical coupling between the airbag Leitrampe and the Pillar trim part This is done by pushing the airbag skid ramp in the course of deployment impinging side airbag out of the air bag inflation area shifted, leaving a "snagging" of the side airbag excluded on the trim part edge edge region of the pillar trim part is. For example, bumps a vehicle occupant in the course of a Collision of the motor vehicle on the airbag Leitrampe, it deforms under Energy absorption, so that thereby an improved occupant protection potential given is. Overall, the airbag barrier ramp is designed to On the one hand, they are yielding enough for deformation under energy absorption an impact, for example by a vehicle occupant is and On the other hand, a functionally safe hijacking of the unfolding Side airbags around the adjacent trim part marginal edge area given is.

According to one Another preferred embodiment, the at least one airbag Leitrampe a mounting area and a deformation area and a space therebetween Designate desired bending area. By means of the attachment area is while the airbag Leitrampe fastened to the vehicle body shell, wherein the deformation area in the assembled state of the airbag Leitrampe in a Leitrampen basic position at least partially spaced from the Fahrzeugrohrbau. at an impact-related and / or airbag-related force from the vehicle interior on the deformation area is this relatively opposite the mounting area in a Leitrampen-displacement position displaceable with simultaneous bending of the predetermined bending range. The deformation area is the same with the adjacent component mechanically coupled, that at a displacement of the deformation range the adjacent component, in particular a trim part marginal edge region, at least partially displaceable out of the airbag inflation area is. As a result, the airbag Leitrampe is designed so that on the one hand simply attached to the vehicle body shell by means of the attachment area can be and on the other hand by the distance from the vehicle body Deformation area a functionally reliable deformation with energy absorption is ensured at a corresponding force. By the between arranged the attachment area and the deformation area Desired bending range, the deformation of the deformation area, d. H. preferably bending the deformation area in the direction of vehicle body shell and thus in the direction of the vehicle outside, be ensured. The mechanical coupling of the airbag-Leitrampe with the adjacent Component is in this case formed on the deformation region. Thereby is at a bending of the deformation region in the direction of the vehicle outside the adjacent component also with in the direction of the vehicle outside shifted and thus shifted out of the airbag inflator.

In In a further development, the desired bending range can be achieved by a predetermined bending line be formed. As a result, due to the arrangement or orientation the desired bending line on the airbag Leitrampe a desired Deformation behavior of the airbag Leitrampe be adjusted.

In a simple embodiment For example, the desired bending line may be spaced apart by a plurality of spaced ones Through holes are formed. This is a simple and inexpensive embodiment the proposed bending line proposed, with each other variant of the Intended bending line is conceivable in which it is ensured that in desired Way the deformation behavior of the airbag Leitrampe can be obtained. For example the predetermined bending line by a corresponding material taper of the Airbag Leitrampe be formed.

In a further embodiment, the setpoint bending line may extend approximately in the vehicle longitudinal direction in the assembled state of the airbag guide ramp. As a result, in particular in the event of an impact, for example of a vehicle occupant, it is ensured in a simple manner that the deformation area the airbag Leitrampe deformed in the desired manner with energy absorption in the direction of the vehicle outside. In principle, the airbag guide ramp could also be mounted so that the desired bending line is aligned, for example, in the vehicle vertical direction, and it must be ensured that the associated airbag is reliably guided around the adjacent component in the course of its deployment during the attachment of the airbag guide ramp On the other hand, in a collision of a vehicle occupant is given a corresponding desired deformation with energy absorption. Due to the mechanical coupling between the airbag guide ramp and the adjacent component, the airbag is routed around the trim part marginal edge region in a functionally reliable manner.

According to one Another embodiment, the deformation region at a the Fastening area opposite free ramp end region with the trim part marginal edge region be coupled. This essentially means the complete deformation area with a corresponding force for a deformation under energy absorption to disposal. In addition, in a simple way, the coupling between the ramp end and the trim part marginal edge area getting produced.

In a development, the free ramp end area at least in the Leitrampen basic position inserted in at least one trim part recess and / or be hooked. This is a functionally reliable coupling or Connection between the free ramp end area and the adjacent one Covering possible.

In a preferred development, the trim part recess be arranged on an end face of the trim part edge edge region. As a result, an overall compact design in the transition region between the Airbag Leitrampe and the cowling possible. In an arrangement the trim part recess on the front side of the trim part edge edge region is also a "flowing" transition from the deformation area the airbag Leitrampe given to the trim part, so that at a any impact of a vehicle occupant on the deformation area no Hazard potential due to the transition Airbag guide ramp / cowling consists.

In a concrete embodiment the free ramp end area can be replaced by a preferably opposite to the Deformation area angled land area be formed. At a front side of the trim part edge edge region may be a grooved Cover part recess be formed in the at least in the Leitrampen basic position the web area at least partially engages. Prefers preferably while the web area positively in the groove-shaped Fairing part recess, so that at a deformation of the Deformationsbereichs and associated relocation of the Deformationsbereichs from the airbag inflating out the cowling functionally reliable mitverlagert so that the associated airbag to the trim panel, especially around the trim part marginal edge area, passed around can be.

According to one another embodiment the airbag Leitrampe in the assembled state, at least in the Leitrampen-basic position be arranged adjacent to the airbag in the airbag basic position. The deformation area is aligned so that the airbag in the course of Aufblasvorgangs towards the vehicle interior the adjacent component is conductive. By the neighboring positioning the airbag guide ramp to the airbag in the airbag basic position is ensures that the airbag is reliable in the course of the inflation process is passed around the adjacent component and in the airbag inflation area for one Occupant protection is deployed accordingly. By the mechanical Coupling between the deformation area and the adjacent component it is ensured that the airbag without a "snagging" on the marginal edge region of the adjacent Component around it in the direction of the vehicle interior, and thus in the airbag inflation area, is conducted.

In a concrete embodiment, the airbag Leitrampe from a Be made of sheet metal. This makes the airbag guardrail easy and cost-effective because the metal sheet used in a simple way by Cutting and bending in the desired geometric shape for the airbag Leitrampe forming the mounting area, the desired bending area and the deformation region can be produced. Basically the airbag Leitrampe for example, also made of a plastic material be made, with care being taken in particular the desired bending range for a corresponding force in desired Can be bent without the plastic material breaks.

According to a further embodiment can then be arranged on the trim part as an adjacent component in the direction of the vehicle roof, a vehicle headliner, which adjoins the fairing edge edge region with a sky edge edge region. Thus, in the non-activated ground state of the safety device by the headliner and the adjacent trim panel is a visually appealing Vehicle interior created, wherein both the airbag and the airbag Leitrampe are hidden by the headliner or by the trim panel.

In a development may in the deformation area a sky recess be formed in the in the Leitrampen-basic position of the sky-edge edge area engages at least partially. In the course of the airbag inflating operation For example, at least the sky marginal edge region may permit clearance of an airbag passage opening the fairing and the headliner be wegverlagerbar. If the safety device is activated, then unfolds the designed as a side airbag Airbag starting from the roof spar area and pushes in the course of deployment the sky edge region from the sky recess in the deformation area the airbag Leitrampe out, so that thereby the airbag passage opening between the fairing part and the vehicle roof is formed. moreover is the impact of the deploying side airbags on the Deformation of the airbag Leitrampe this partially in the direction Vehicle shell and thus shifted towards the vehicle outside and due the mechanical coupling between the deformation area and the Cowling is this with in the direction of the vehicle outside relocated. Thereby, the airbag passage opening between the cowling and the vehicle head even increased advantageous, due to the control function the airbag skid ramp and the mechanical coupling between the airbag skid ramp and fairing part is ensured that the side airbag in Course of unfolding functionally safe in the direction of airbag inflation can be deployed in the airbag operating position.

In a further embodiment can at least between the cowling and the vehicle body be arranged a deformation element. This is in a crash For example, a vehicle occupant during a collision with the Cowling a corresponding desired deformation of the deformation element possible with energy absorption, so that thereby a protection potential for the vehicle occupants is given. When designing the deformation element, care must be taken that in particular in the lining part edge edge region a corresponding displacement the same together with the deformation area of the airbag Leitrampe is possible in a collision of the airbag to the deformation area.

Based a drawing is an embodiment closer to the invention explained.

It demonstrate:

1 a schematic sectional view through a roof rail area with a side airbag in an airbag basic position and an airbag Leitrampe in a Leitrampen-basic position, and

2 a schematic sectional view of the roof spar portion of 1 wherein the airbag is shown in an airbag operating position and the airbag skid ramp is in a skid ramp displacement position.

In 1 is a schematic sectional view of a roof spar area 1 a motor vehicle with a safety device 2 shown. The safety device 2 has one in the roof spar area 1 arranged side airbag 3 as an airbag, in 1 in the non-activated basic state of the safety device 2 is shown in a folded airbag basic position. The roof spar area 1 is designed as an airbag connection area.

Adjacent to the side airbag 3 is an airbag guardrail 4 at the roof spar area 1 arranged. The airbag guardrail 4 has a mounting area 5 and a deformation area 6 and a predetermined bending region disposed therebetween 7 on. By means of the attachment area 5 is the airbag guardrail 4 on the vehicle body shell 17 of the roof rail area 1 attached, the deformation area 6 in the assembled state of the airbag Leitrampe 4 in the in 1 shown Leitrampen basic position of the vehicle body shell 17 is spaced. The target bending range 7 is formed in the illustrated embodiment by a predetermined bending line, which is aligned in the vehicle longitudinal direction, which extends in the illustrated view perpendicular to the plane of the drawing. In addition, the specified bending line 7 by a plurality of spaced apart through-holes 8th formed for the representation in 1 selected cutting plane through one of these through holes 8th runs. At one the attachment area 5 opposite free ramp end area 9 the deformation area 6 is one opposite the deformation area 6 Angled bridge area 10 educated. In addition, in the deformation area 6 a sky recess 11 educated.

To the roof spar area 1 is a cowling 12 mounted adjacent, wherein a trim part edge edge region 13 in the direction of the roof spar area 1 has. In the trim part marginal edge area 13 is a groove-shaped trim part recess 14 formed in the Leitrampen in the basic position of the web area 10 the airbag guardrail 4 positively engages. In addition is a vehicle sky 15 provided with a sky edge edging area 16 to the trim part marginal edge area 13 in the non-activated basic state of the safety device 2 borders. The sky border edge area 16 engages in the sky recess 11 at the airbag-Leitrampe 4 so that overall a visually appealing vehicle interior in the area of the roof spar area 1 through the trim part 12 and the vehicle sky 15 is created. Both the side airbag 3 in the airbag basic position and the airbag Leitrampe 4 in the Leitrampen basic position are by the vehicle head 15 or the trim part 12 covered. Between the trim part 12 and the adjacent vehicle body shell 17 can be a deformation element 18 , this in 1 only dashed lines is shown schematically, be arranged.

Upon activation of the safety device 2 becomes the side airbag 3 in the direction of the vehicle floor (arrow 19 in 2 ) unfolds. In the course of this deployment, the side airbag hits 3 on the deformation area 6 the airbag guardrail 4 so that this while bending the predetermined bending range 7 in the direction of vehicle bodywork 17 and thus is shifted in the direction of the vehicle outside (arrow 20 in 1 ). In addition, the sky edge edge area 16 for releasing a corresponding airbag passage opening, as is made 2 is apparent, wegverlagert. Due to the mechanical coupling between the airbag skid ramp 4 and the trim part 12 , ie by the formation of the connector between the land area 10 and the groove-shaped trim part recess 14 , the trim part edge edge area becomes 13 and thus partially the trim part 12 together with the deformation area 6 in the direction of vehicle bodywork 17 shifted, so that the side airbag in the course of deployment functionally safe to the trim part marginal edge region 13 is guided around. A possible "snagging" of the side airbag 3 on the trim part edge edge area 13 is thus excluded functionally reliable. The between the fairing part 12 and the vehicle body shop 17 arranged deformation element 18 is going to like this 2 is visible, deformed.

Impels a vehicle occupant, for example, in the course of a collision of the motor vehicle against the airbag Leitrampe 4 , this deforms under energy absorption, so that thus improved occupant protection in the airbag Leitrampe 4 for example, in a head impact of a vehicle occupant against the airbag Leitrampe 4 given is. By an appropriate design of the desired bending range 7 in the embodiment shown here by a plurality of through holes 8th is formed, as desired, the deformation behavior of the airbag Leitrampe 4 be set.

As a result, in the safety device according to the invention 2 with appropriate airbag-Leitrampe 4 ensured that on the one hand at an activation of the side airbag 3 a corresponding bypassing the side airbag 3 around the trim part marginal edge area 13 due to the mechanical coupling between the airbag skid ramp 4 and the trim part 12 is ensured. On the other hand, a desired deformation behavior of the airbag Leitrampe 4 in a collision of a vehicle occupant against the airbag Leitrampe 4 through the formation of the deformation area 6 or the desired bending range 7 the airbag guardrail 4 given. The airbag guardrail 4 can thus be made yielding enough for a head impact, while ensuring that the unfolding side airbag 3 functionally reliable on the trim part marginal edge area 13 can be passed by.

1

Roof rail area

2

safety device

3

side airbags

4

Airbag guide ramp

5

fastening area

6

deformation area

7

Predetermined bending area

8th

Through Hole

9

free Ramp end

10

web region

11

Sky recess

12

cowling

13

Covering part-peripheral edge portion

14

Cowling recess

15

headlining

16

Sky marginal edge region

17

bodyshell

18

deformation element

19

arrow

20

arrow

21

Airbag inflation area

Claims (16)

Safety device for a vehicle, in particular for a motor vehicle, with at least one airbag, which is fixed to the vehicle in a non-activated basic state in a folded airbag basic position on an airbag connection area and which, upon activation of the safety device from the airbag connection area starting in his airbag Functional position deployed in an airbag inflating area, and with at least one airbag inflating area arranged in the airbag inflation area, by means of which the airbag in the course of Inflatable process is guided around an adjacent component, characterized in that the airbag Leitrampe ( 4 ) is formed as a deformation element, which with the adjacent component ( 12 ) is mechanically coupled in such a way that, in the event of an airbag-induced force effect, it is coupled with the adjacent component ( 12 ) from the airbag inflation area ( 21 ) is displaceable, and that this is deformable in an impact force due to energy absorption. Safety device according to claim 1, characterized in that the airbag ( 3 ) and the airbag guardrail ( 4 ) is arranged in a vehicle interior of the vehicle. Safety device according to claim 2, characterized in that the airbag is used as a side airbag ( 3 ) on a roof rail area ( 1 ) is arranged as an airbag connection region, and that the adjacent component by a trim part ( 12 ), in particular by a pillar trim part, which in the mounted state with a trim part edge edge region ( 13 ) in the direction of the roof spar area ( 1 ). Safety device according to one of claims 1 to 3, characterized in that the at least one airbag-Leitrampe ( 4 ) a fastening area ( 5 ) and a deformation area ( 6 ) and a predetermined bending region ( 7 ), that the airbag guide ramp ( 4 ) by means of the attachment area ( 5 ) on the vehicle body shell ( 17 ) and that the deformation area ( 6 ) in the assembled state of the airbag guide ramp ( 4 ) in a Leitrampen basic position at least partially from the vehicle body shell ( 17 ) is spaced, that in an impact-related and / or airbag-induced force from the vehicle interior forth on the deformation region ( 6 ) this relative to the mounting area ( 5 ) is displaceable in a Leitrampen-displacement position while bending the predetermined bending region ( 7 ), and that the deformation area ( 6 ) so with the adjacent component ( 12 ) is mechanically coupled, that during a displacement of the deformation region ( 6 ) the adjacent component ( 12 ), in particular a trim part marginal edge region ( 13 ), at least partially from the airbag inflation area ( 21 ) is displaceable out. Safety device according to claim 4, characterized in that the predetermined bending region by a predetermined bending line ( 7 ) is formed. Safety device according to claim 5, characterized in that the predetermined bending line ( 7 ) by a plurality of spaced apart through-holes ( 8th ) is formed. Safety device according to claim 5 or 6, characterized in that the predetermined bending line ( 7 ) in the assembled state of the airbag guide ramp ( 4 ) extends approximately in the vehicle longitudinal direction. Safety device according to one of claims 4 to 7, characterized in that the deformation region ( 6 ) at one of the attachment area ( 5 ) opposite free ramp end region ( 9 ) with the trim part marginal edge region ( 13 ) is coupled. Safety device according to claim 8, characterized in that the free ramp end region ( 9 ) at least in the Leitrampen basic position in at least one trim part recess ( 14 ) is inserted and / or hooked. Safety device according to claim 9, characterized in that the trim part recess ( 14 ) on a front side of the trim part edge edge region ( 13 ) is arranged. Safety device according to one of claims 9 to 10, characterized in that the free ramp end region ( 9 ) by a preferably opposite the deformation area ( 6 ) angled land area ( 10 ) is formed, and that on an end face of the trim part edge edge region ( 13 ) a groove-shaped trim part recess ( 14 ) is formed, in the at least in the Leitrampen-basic position of the web area ( 10 ) at least partially, preferably positively engages. Safety device according to one of claims 4 to 11, characterized in that the airbag guide ramp ( 4 ) in the assembled state at least in the Leithampen-basic position adjacent to the airbag ( 3 ) is arranged in the airbag basic position such that the deformation area ( 6 ) is aligned so that the airbag ( 3 ) in the course of the inflation process in the direction of the vehicle interior in front of the adjacent component ( 12 ) is conductive. Safety device according to one of claims 1 to 12, characterized in that the airbag guide ramp ( 4 ) is made of a metal sheet. Safety device according to one of claims 4 to 13, characterized in that on the trim part ( 12 ) as an adjacent component in the direction of the vehicle roof then a vehicle roof ( 15 ) arranged with a sky marginal edge region ( 16 ) to the trim part marginal edge region ( 13 ) adjoins. Safety device according to claim 14, characterized in that in the deformation area ( 6 ) a sky recess ( 11 ) is formed, in which in the Leitrampen-basic position of the sky marginal edge area ( 16 ) engages at least in regions, and that during the course of the airbag inflation process at least the sky marginal edge region ( 16 ) for a release of an airbag passage opening between the trim part ( 12 ) and the vehicle sky ( 15 ) is wegverlagerbar. Safety device according to one of claims 1 to 15, characterized in that between the lining part ( 12 ) and the vehicle body shell ( 17 ) at least one deformation element ( 18 ) is arranged.