DE102005004818A1 - Safety belt system for motor vehicle has two-layered belt strap, extending from rewinder, which is connected to connecting element, that is connected with vehicle whereby belt tongue is connected to loop and extends through eyelet - Google Patents

Abstract

Safety belt system has a two-layered belt strap (10), inflatable in sections, extending from rewinder (35), which is connected with the connecting element that is directly or indirectly connected with the vehicle. The belt tongue (30) is connected to the loop (20) and extends through the eyelet.

Description

The The invention relates to a safety belt system for a motor vehicle after The preamble of claim 1 and according to the preamble of the claim 6th

In The technology is safety belt systems with an inflatable belt known. Here, the webbing is at least partially double-layered formed so that formed between the two layers of a cavity is that coming from an inflator in case of an accident Gas filled can be. The cavity should at least also be at the level of the shoulder clavicle and sternum area of the occupant and has the task reduce the maximum pressure that the webbing exerts on the occupant or limit.

mostly the gas generator is located where the webbing over a End fitting with the interior structure of the vehicle or with the vehicle seat connected is. From here flows If necessary, the gas in the webbing and fills the cavity, which he, As already mentioned, at least up to the height the shoulder of the occupant extends. A problem here is that between the gas generator and the shoulder area of the occupant in a buckle inserted belt tongue is through its eyelet the webbing running. Through this eyelet the webbing is strongly deflected and buckled; this creates a bottleneck that is filling of the webbing obstructed in its upper section.

To solve this problem is out of the DE 198 04 365 A1 a generic safety belt system known, the webbing in the region of the belt tongue has a formed by a separate component, constantly open gas channel. This solution has in addition to the high cost, which is necessary for the production of such a webbing, the further disadvantage that the webbing is relatively stiff in the region of the belt tongue.

Of these, Based on the object of the invention, a generic safety belt system to the effect to further develop that it is relatively easy to produce on the one hand and on the other hand the flexibility the webbing is not affected becomes.

These Task is performed by a safety belt system with the characteristics of Claim 1 or solved with the features of claim 6.

According to the invention Belt tongue not arranged directly on the webbing. In a first embodiment the belt tongue is arranged on a loop, which with the webbing connected is. This loop is preferably made of fabric, for example the same fabric as the webbing itself, so no essential impairment the flexibility occurs. Now not the webbing itself, but the loop through the eyelet of Belt tongue runs, occurs no kinking of the webbing and thus no constriction of the Gas flow more on. With very simple mechanical means is Thus, the unimpeded gas flow of the gas from the gas generator to the Shoulder area of the occupant ensured.

There the webbing differently for different sized people is pulled out, the loop should be at least a length of 50 cm. Hereby are all setting ranges of one completely pushed back Seat and a very slender inmate to a very pushed forward Seat covered with a corpulent inmate.

In A preferred variant of the first embodiment is the loop designed with a smaller width than the webbing and preferably with sewn a layer of webbing. Here, the seam may be configured in sections as a sacrificial seam. This sacrificial seam is here designed so that they are under load (Frontal collision) tears under energy dissipation and thus contributes to limiting the force. Another The advantage of such a sacrificial seam is that one located behind the sacrificial seam second seam a lower tear strength must have, as it is necessary without such an upstream sacrificial seam would.

The Seat belt system according to the just described first embodiment Although mechanically simple, but relatively difficult to produce, Since it is usually complicated, the loop with only one layer to sew the webbing. This is technically possible usually associated with not inconsiderable expense. In a second embodiment The invention is therefore a movably arranged on the webbing Hose element provided on which in turn fastened the belt tongue is. Will be an ordinary one Belt tongue with an eyelet used, the connection between belt tongue and hose element for example by means of a strip-shaped connecting element done, which extends through the eyelet of Gurtzunge and sewn to the hose element is.

The fact that the webbing is no longer cut through the eye of the belt tongue, but is deflected by the hose member with a relatively large radius is essential given better gas permeability in this area.

The Manufacturability of a safety belt system according to the invention according to this embodiment is relatively easy, because the hose element attached thereto Belt tongue can be made separately and then pushed onto the strap.

One Such a seat belt system not only has the advantage of being better Gas permeability in the area of the belt tongue, but also that of a lesser wear of the Webbing. A corresponding hose element to which the belt tongue attached is therefore not only in safety belt systems with inflatable Webbing, but also in ordinary Seat belt systems used with a non-inflatable webbing become.

The Invention will now be described with reference to an embodiment with reference to the figures explained in more detail. in this connection demonstrate:

1 A passenger secured with a seat belt system according to the first embodiment;

2 a longitudinal section through webbing, loop and belt tongue,

3 a section along the plane AA 2 .

4 a perspective view of an embodiment of the second embodiment of the invention.

The 1 shows an inmate 1 fixed with a three-point safety belt system. The seat belt system has an inflatable belt extending from one end fitting 37 trained fastener via a deflector 36 until the reel 35 extends. In the area of the end fitting 37 is a gas generator 38 arranged, the two-layered webbing 10 filled with gas. The webbing 10 has a pelvic section when put on 10a and a torso section 10b on; between these two areas it will be through a belt tongue 30 , which in operation in the buckle 34 is plugged in, diverted.

On the webbing 10 is a loop 20 arranged, extending through the eyelet of the belt tongue 30 extends. This will cause the webbing 10 not constricted and there may be an unimpeded flow of gas from the gas generator 38 to the upper body section 10b done the webbing.

The 2 shows a schematic longitudinal section of the safety belt system in the region of the belt tongue 30 , The webbing 10 is double-layered from a first position 11 and a second location 12 educated. Between the two layers is a cavity 14 , in which gas coming from the gas generator can flow in, so that the webbing 10 expands. To the second location 12 is over seams 21 . 22 the loop 20 sewn. The loop 20 extends through the eyelet of the belt tongue 30 , The free length ΔI of the loop is in this case preferably between 20 cm and 70 cm. As shown, the loop is 20 at both ends over two seams 21 . 22 with the second layer 12 of the webbing 10 connected. Each of the second seam 22 upstream first seam 21 is designed here as a sacrificial seam and in this case designed so that it, when the occupant in a head-on collision in the webbing 10 falls into it, bursts under energy consumption and thus makes a contribution to the non-reversible, energy-dissipating Gurtkraftbegrenzung.

How to use 3 which cuts out along the AA plane 2 is, sees, is the width of the loop 20 less than the width of the webbing 10 , This is necessary in this embodiment, so that the loop 20 with only one location 12 the webbing can be sewn. In principle, it would also be conceivable to use the loop 20 sections on the edge by means of the belt seam 15 To connect with the webbing, but this would be an attachment of the sacrificial sutures proposed here (first sutures 21 ) not possible.

Preferably, the loop exists 20 made of the same material as the two layers 11 . 12 of the webbing 10 ,

4 shows an embodiment of the second embodiment of the invention. On the webbing 10 , which is here as an inflatable belt with a first layer 11 and a second location 12 is formed, the hose element is slidably 40 arranged. This hose element 40 surrounds the webbing 10 Completely. At the hose element 40 is the belt tongue 30 attached. In this embodiment, the belt tongue 30 like an ordinary belt tongue too, an eyelet 32 on, through which the connecting element formed from a textile strip 42 extends, which in turn via seams 44 with the hose element 40 sewn. The connecting element 42 So also forms a loop, the difference to the first embodiment is that this loop is not directly connected to the webbing, but only indirectly, namely by means of slidably on the webbing 10 arranged hose element 40 ,

Again, there is no direct contact between the edge of the eyelet 32 and the webbing 10 instead of. This reduces in any case the wear of the webbing 10 and in the case of an inflatable belt shown here, the gas permeability in the region of the deflection is not or only slightly reduced.

The hose element 40 can be woven as a closed tube or consist of two edge sewn together Gurtbandlagen.

10

webbing

10a

Beck section

10b

Upper body section

11

first location

12

second location

14

cavity

15

Gurtbandnaht

20

loop

21

first seam

22

second seam

30

belt tongue

32

eyelet

34

buckle

35

retractor

36

diverter

37

Endfitting

38

inflator

40

hose element

42

connecting element

I

inmate

Claims (9)

Safety belt system for a motor vehicle with a two-layer, at least partially inflatable, from a directly or indirectly connected to the motor vehicle fastener to a retractor ( 35 ) extending webbing ( 10 ), a gas generator ( 38 ) for inflating the webbing and an eyelet having tongue ( 30 ), via which the webbing is indirectly connectable to a buckle, characterized in that with the webbing ( 30 ) a loop ( 20 ) which extends through the eyelet. Safety belt system according to claim 1, characterized in that that the loop is a length of at least 40 cm. Safety belt system according to one of the preceding Ansprpüche, characterized in that the width of the loop is less than the width of the unbent webbing is. Safety belt system according to claim 3, characterized in that the loop with a layer ( 12 ) of the webbing is sewn. Safety belt system according to claim 4, characterized in that that the seams at least in sections are designed as sacrificial seams. Seat belt system with a webbing extending from a reel to a fastener directly or indirectly connected to the vehicle ( 10 ), which by means of a belt tongue ( 30 ) is connectable with a belt buckle, characterized in that the belt tongue with a hose element ( 40 ) which is slidable on the webbing ( 10 ) is arranged. Safety belt system according to claim 6, characterized in that that the webbing is an inflatable webbing. Safety belt system according to claim 6 or claim 7, characterized in that the belt tongue an eyelet ( 32 ), through which a connecting element ( 42 ), which is connected to the hose element ( 40 ) connected is. Safety belt system according to one of claims 6 to 8, characterized in that the hose element consists of tissue.