Automobile safety belt device

Abstract

The invention relates to a safety belt device for a motor vehicle, comprising: a belt (3), one end of which can be wound on a first belt retractor; one end of the shoulder strap (2) can be wound on the second safety belt retractor; the waist belt (3) and the shoulder belt (2) are provided with a common belt tongue piece (1) which can be detachably locked in the belt buckle, the waist belt (3) and the shoulder belt (2) are formed by different parts of a single belt belt body (100), the belt tongue piece (1) is fixed on the belt belt body (100), and the belt tongue piece (1) can be detachably locked in the belt buckle. The safety belt body (100) is divided into a shoulder belt (2) and a waist belt (3).

Description

[0001] The invention relates to a car safety belt arrangement having the features of the preamble of claim 1.

[0002] Car safety belt arrangements having a three-point geometry are known from the prior art, which have two safety belt re-tractors fixed to the vehicle, a lap belt and a shoulder belt, which are each wound with one end on these safety belt re-tractors, mutually separably. Furthermore, a safety belt buckle is provided, which is fixed to the vehicle, and the free ends of the lap belt and the shoulder belt can be locked in this safety belt buckle by means of a common safety belt tongue. In order to achieve a three-point geometry, the lap belt and the shoulder belt are led to the passenger from the same side, while the safety belt buckle is fixed on the other side of the passenger, to which the lap belt and the shoulder belt can be locked by means of the safety belt tongue. For this purpose, the safety belt re-tractors can be fixed to the vehicle structure or to the vehicle seat on the same side of the passenger, while the safety belt buckle is fixed on the other side of the passenger.

[0003] Such a safety belt arrangement is shown and described in DE 199 15 275 A1, in which the lap belt and the shoulder belt are each provided with a respective safety belt retractor. The belt ends of the lap belt and the shoulder belt meet and are fixed at a common safety belt tongue, which can be locked in a safety belt buckle to fasten the safety belt. The construction of this safety belt arrangement requires the vehicle manufacturer to connect the two safety belt sections together by connecting the lap belt or the shoulder belt with the safety belt tongue on the assembly line.

[0004] The object of the invention is to provide a safety belt arrangement having two independent safety belt re-tractors, which should be able to be installed on a vehicle simply and economically.

[0005] This object is achieved by a safety belt system having the features of claim 1. Preferred embodiments of the invention are provided in the dependent claims, the figures and the related description.

[0006] According to the basic idea of the invention, it is proposed that the lap belt and the shoulder belt of the safety belt arrangement are formed from different parts of a single safety belt web, wherein the safety belt tongue is fixed to the safety belt web, which is divided into parts forming the shoulder belt and the lap belt.

[0007] The advantage of the invention is that, in addition to the securement of the belt retractor and the belt buckle to the vehicle seat or the vehicle structure, no additional installation steps are required to connect the lap belt portion and the shoulder belt portion together at the common belt tongue when installing the belt system with two belt retractors, since the belt webbing is formed by a single belt webbing, and the length-constant lap belt and the length-constant shoulder belt are separated from the belt webbing by the belt tongue, which is secured to the belt webbing. Thus, to install the belt system, only the two belt retractors and the belt buckle have to be secured to the vehicle seat or the vehicle structure, and then the belt system can be used without further installation steps.

[0008] It is further proposed that the belt tongue has a tongue body with a through-opening, and that the tongue body has a deflector on one side of the through-opening and a latch on the other side of the through-opening, wherein the belt webbing extends through the through-opening, and the deflector and the latch are arranged on different sides of the belt webbing. With this solution, it is possible to avoid or at least reduce the forces acting on the belt tongue itself in the event of an accident, since the belt tongue is directly subjected to the tensile forces when the belt webbing is subjected to tensile forces, rather than via the fixed connection point of the belt tongue on the belt webbing.

[0009] It is further proposed that the belt tongue is secured to the belt webbing on the side of the belt tongue that is remote from the belt buckle in the locked position of the belt tongue. In this way, the fixing point of the belt tongue is located in a region on the belt webbing that is located between the ends of the lap belt and the shoulder belt, which extend away from the belt tongue at an acute angle. This makes it possible to avoid the fixing point of the belt tongue being subjected to tensile forces in the event of a restraint, and thus to reduce the likelihood of mechanical damage to the fixing point in the event of forces being applied.

[0010] It is further proposed that the belt tongue has a deflector, and that the belt tongue is fixed in such a way that the belt tongue is secured to the belt loop, which is sewn on one side to the belt webbing, by means of the deflector. By means of the deflector and by means of the fixing of the belt tongue to the belt loop, which is sewn on one side to the belt webbing, the belt tongue is still able to perform slight pivoting movements relative to the belt webbing, which are necessary for the orientation of the belt tongue when it is locked in the belt buckle. The belt loop itself forms a separate fixing component, which is secured to the belt webbing, and the belt webbing itself does not have to be changed in any way. The belt webbing only has to have a flat, free outer side at the intended separation of the lap belt and the shoulder belt, in order to sew the belt loop there.

[0011] In this case, it is further proposed that the belt loop is formed by a folded-back belt webbing segment which is sewn to the belt webbing in the folded-back portion by a first seam, forming a three-layer overlap. By the proposed belt loop design and the sewing in the folded-back portion of the belt webbing segment, the belt loop can be sewn to the belt webbing by a single seam, thus reducing the manufacturing difficulty and the associated manufacturing costs.

[0012] In this case, it is further proposed that the folded-back portion of the belt loop extends beyond the three-layer overlap at the end and is sewn to the belt webbing in the end by a second seam, forming a two-layer overlap. By the end extending beyond the three-layer overlap and the sewing thereof, the fixing strength of the belt loop is further improved. Furthermore, the edge of the three-layer overlap which originally spanned the belt webbing is covered by the end extending thereover, forming a more uniform wave-shaped profile, so that the remaining edge height of the two-layer overlap is significantly reduced. Thus, when the belt webbing slides over a clothing or seat surface, the mechanical stress on the edge itself is less and the sliding of the edge causes less wear on these surfaces.

[0013] As an alternative, it is proposed that the belt loop is formed by a belt webbing segment which has a protruding extension at one end which is of a smaller width than the belt webbing segment and a cutout at the other end which is of a width which is equal to or greater than the extension, wherein the belt webbing segment is folded back into the cutout by the extension, forming the belt loop, and is sewn with at least one seam which connects the extension and the edge portion of the belt webbing segment delimiting the cutout to the belt webbing. The proposed belt loop design causes the folded-back portion to extend into an intentionally formed recess, so that the belt loop itself has only one layer in the sewn area and is sewn to the belt webbing as a two-layer overlap. In this way, the belt webbing segment is sewn to the belt webbing separately and independently both in the edge region of the cutout and in the folded-back region of the extension, so that a weakening in one of the two seam areas does not necessarily lead to a weakening of the fixing of the belt loop in the other of the two areas. Furthermore, this makes the belt webbing thinner in the area of the belt loop seam.

[0014] It is further proposed that the through-opening is delimited on the side opposite the deflecting tab by two edge sides which extend outwardly conically with respect to the through-opening and extend toward one another. Since the edges are conical, the center is widened as viewed transversely to the longitudinal extension of the belt webbing, so that the belt tab can be pivoted slightly further with respect to the belt webbing and vice versa.

[0015] wherein the lock tongue preferably has a locking cutout for engaging a locking element of a belt buckle, and the locking cutout and the through-opening are in communication with one another, so that the through-opening and the locking cutout form a common cutout.

[0016] The edge sides of the through-opening, which taper towards each other, preferably adjoin the edge sides of the locking cutout, so that the geometry of the through-opening and the locking cutout can be realized with as uniform edge sides and as uniform width as possible.

[0017] It is further proposed that the safety belt tongue is fixed on the safety belt webbing in such a way that it is oriented at an angle of 5 to 20 degrees with respect to the longitudinal extension of the safety belt webbing. By orienting the safety belt tongue at an angle, it is possible to orient the safety belt tongue at an angle with respect to the safety belt webbing when it is in the locked position in the safety belt buckle, so that at least a slight creasing of the safety belt webbing is reduced. Furthermore, in this way, it is possible to adjust the safety belt tongue into a more ergonomic, easier-to-grasp position before the safety belt is fastened.

[0018] The application will be explained below with reference to the preferred embodiments and with reference to the drawings. In the drawings,

[0019] Figure 1 The safety belt webbing of the safety belt arrangement according to the application comprises a safety belt tongue and a waist belt and a shoulder belt which are oriented at an angle to each other in an oblique view; and

[0020] Figure 2 The safety belt webbing according to the application comprises a safety belt tongue and a waist belt and a shoulder belt which are oriented at an angle to each other in an oblique view; and Figure 1 The safety belt webbing according to the application comprises a safety belt tongue and a waist belt and a shoulder belt which are oriented at an angle to each other in an oblique view; and

[0021] Figure 3 The safety belt webbing according to the application comprises a safety belt tongue and a waist belt and a shoulder belt which are oriented at an angle to each other in an oblique view; and Figure 1 The safety belt webbing according to the application comprises a safety belt tongue and a waist belt and a shoulder belt which are oriented at an angle to each other in an oblique view; and

[0022] Figure 4 The side view of a safety belt webbing comprising a safety belt loop according to the first alternative; and

[0023] Figure 5 The oblique view of a safety belt webbing comprising the safety belt loop shown in Figure 4

[0024] The side view of a safety belt webbing comprising a safety belt loop according to the second alternative; and Figure 6

[0025] The oblique view of a safety belt webbing comprising the safety belt loop shown in Figure 7 Figure 6 The side view of a safety belt webbing comprising a safety belt loop according to the second alternative; and

[0026] Figure 8 The side view of a safety belt webbing comprising a safety belt loop according to the second alternative; and

[0027] Figure 9 The oblique view of a safety belt webbing comprising the safety belt loop shown in​Figure 6 Oblique view of the safety belt webbing and the safety belt tongue shown.

[0028] Figure 1 and Figure 2 A part of a motor vehicle safety belt arrangement according to the application is shown in different views. The safety belt arrangement has a single safety belt webbing 100 which is divided by a safety belt tongue 1 fixed thereon into a shoulder belt 2 and a lap belt 3. The ends of the shoulder belt 2 and the lap belt 3 can be wound on safety belt re-tractors, not shown, which are independent of each other. Furthermore, a safety belt buckle, not shown, is provided in which the safety belt tongue 1 can be locked in order to buckle the safety belt webbing 100.

[0029] In order to achieve a three-point geometry of the safety belt arrangement, the safety belt retractor is fixed to the vehicle seat or vehicle structure on the side of the passenger, while the safety belt buckle is fixed to the vehicle seat or vehicle structure on the other side of the passenger. If the safety belt retractor is not fixed directly to the side of the passenger, it can also be fixed at a distance, and the shoulder belt 2 and / or the lap belt 3 can be deflected by one or more deflection devices and guided to the shoulder and / or the waist of the passenger after deflection.

[0030] The safety belt tongue 1 has a tongue body 30 which comprises a through-opening 8 through which the safety belt webbing 100 extends. Furthermore, the tongue body 30 of the safety belt tongue 100 has a deflection tab 6 which delimits the through-opening 8 on one side and a locking tab 5 which is arranged on the other side of the through-opening 8, wherein the safety belt tongue 1 is oriented on the safety belt webbing 100 in such a way that the deflection tab 6 is located on the side of the safety belt webbing 100 which faces the passenger in the locked state of the safety belt tongue, and the locking tab 5 is located on the side of the safety belt webbing 100 which corresponds to the safety belt buckle in the locked state of the safety belt tongue 1. Of course, the tongue body of the safety belt tongue 1 can comprise additional trim parts, coverings, surface treatments or additional accessories such as sensors.

[0031] Thus, when the safety belt tongue 1 is in the locked position in the safety belt buckle, the orientation of the safety belt webbing 100 is such that the shoulder belt 2 and the lap belt 3 converge from the passenger towards the safety belt tongue 1 at an acute angle of less than 90 degrees. At this time, the deflection tab 6 is located in this acute angle, the edge of the deflection tab 6 which delimits the through-opening 8 providing the possibility of deflection for the safety belt webbing 100, while the safety belt tongue 1 is locked in the safety belt buckle by means of the locking tab 5.

[0032] The safety belt tongue 1 is fixed to the safety belt webbing 100 in a non-pullable but pivotable manner by means of the deflection tab 6. For this purpose, on the side facing the passenger, i.e. on the side on which the deflection tab 6 is located, a safety belt loop 4 is provided which is sewn on the safety belt webbing 100 and through which the deflection tab 6 of the safety belt tongue 1 extends.

[0033] When the occupant is restrained, he is restrained by the shoulder strap 2 and the lap belt 3 of the safety belt webbing 100, whereupon the applied tensile force is transmitted via the locking tongue 5 to the safety belt buckle and further to the vehicle structure or to a seat fixed in the vehicle. At this point, the safety belt loop 4 is located at the acute angle between the lap belt 3 and the shoulder strap 2 and is covered by the safety belt webbing 100 to the side of the safety belt buckle, so that the safety belt loop 4 itself and the fastening of the safety belt loop 4 on the safety belt webbing 100 to be described below are not stressed or as little stressed as possible in the case of restraint.

[0034] The through-opening 8 has a straight edge on the side of the deflection tab 4, which is preferably oriented orthogonally to the direction of insertion of the safety belt tongue 1 into the safety belt buckle. Furthermore, the safety belt tongue 1 has a locking tongue 5 arranged on the other side of the through-opening 8, which has a locking cutout 7 in the form of a rectangular opening, which extends longitudinally parallel to the direction of insertion of the safety belt tongue 1 into the safety belt buckle and thus orthogonally to the straight edge of the deflection tab 6 delimiting the through-opening 8.

[0035] The through-opening 8 of the safety belt tongue 1 on the side facing the locking cutout 7 and away from the deflection tab 6 is expanded into a larger opening by two oppositely extending edge portions 24 and 25, which taper outwardly with respect to the through-opening 8, as shown in Figure 3 This enables a slight pivoting movement of the safety belt tongue 1 with respect to the safety belt webbing 100 and vice versa. The oppositely tapering edge portions 24 and 25 then engage with the edge portions delimiting the locking cutout 7 of the locking tongue 5.

[0036] The through-opening 8 of the safety belt tongue 1 and the locking cutout 7 of the locking tongue 5 thus form a common or unique opening in the safety belt tongue 1, which has a circumferentially extending edge, which on one side is formed by the straight design of its edge of the deflection tab 6.

[0037] The side view and the perspective view of the safety belt webbing 100 containing the safety belt loop 4 in the second embodiment can be seen in Figure 4 and Figure 5 The safety belt loop 4 is formed from a folded-back safety belt webbing segment 23 and has a through-opening 9, which is formed by the deflection tab 6 of the safety belt tongue 1 and the locking cutout 7 of the locking tongue 5, as shown in Figure 4 and Figure 5The conceivable belt tongue 1 is secured in this opening together with the deflector 6. The belt body section 23 is formed from a small, single-layer length of belt material cut from the belt body, which can be woven, for example, in the same manner as the belt body 100 forming the shoulder strap 2 and lap belt 3. The belt body section 23 has a bottom layer 10, onto which it is folded back by an upper layer 11, forming the opening 9. The upper layer 11, bottom layer 10, and belt body 100 form a three-layer overlap 14, with the belt loop 4 being secured to the belt body 100 by a first stitch 12. In this case, the upper layer 11 is naturally passed through the through-opening 8 of the belt tongue 1 to secure the belt tongue 1 so that the deflector 6 of the belt tongue 1 is located in the opening 9 of the belt loop 4. The seat belt body section 23 further includes an end portion 16 extending beyond the triple overlap portion 14. This end portion forms a double overlap portion 15 with the seat belt body 100, and the seat belt loop 4 is further sewn into this double overlap portion via a second stitch 13. The end portion 16 covers the edge side of the bottom layer 10 on the seat belt body 100 to form a more uniform surface, and the seat belt loop 4 is further secured to the seat belt body 100 via the second stitch 13.

[0038] Figures 6 to 9 A second alternative embodiment of the seat belt loop 4 is shown, wherein Figure 8 1 and 2. The belt segment 23 of the belt loop 4 can be seen before being secured to the belt segment 10. The belt segment 23 has a centrally protruding tongue-shaped extension 17 on one side and a cutout 18 extending centrally into the belt segment 23 on the other side. The cutout 18 is bounded on either side by edge portions 19 and 20 of the belt segment 23, respectively, and has a width that is equal to or slightly greater than the width of the extension 17 in the longitudinal direction of the belt segment 23.

[0039] In order to fix the safety belt loop 4 on the safety belt body 100, Figure 6 and Figure 7 In the position shown, the seat belt section 23 is placed on the seat belt body 100. Then, the extension 17 of the seat belt section 23 is folded back until the extension 17 is located in the cutout 18, thereby forming the opening 9 of the seat belt loop. The extension 17 of the seat belt section 23 is passed through the through opening 8 of the seat belt tongue 1, so that the deflector 6 of the seat belt tongue 1 is located in the opening 9 of the seat belt loop 4, as shown in FIG. Figure 9In this case, the extension 17 and the edge portions 19 and 20 form a layer which is sewn to the belt webbing 100 by means of the two seams 21 and 22, forming a double-layer overlap. Due to the narrow width of the extension 17, the belt tongue 1 is fixed to the belt webbing 100 with a small width, but this does not constitute a disadvantage, since according to the arrangement of the belt tongue 1 proposed here, the actual force transmission in the case of a passenger being restrained is directly from the belt webbing 100 to the belt tongue 1 via the deflection tab 6. However, the design of the belt loop 4 proposed here has the advantage that the belt loop 4 is sewn to the belt webbing 100 only in the double-layer overlap, so that in the sewn area of the belt loop 4, the thickness of the belt webbing 100 is increased only by the thickness of the layer of belt webbing segment 23.

[0040] The belt webbing 100 is implemented as a single and integral belt webbing 100 and extends through the through-opening 8 of the belt tongue 1 such that the deflection tab 6 and the latch tongue 5 of the belt tongue 1 are located on different sides of the belt webbing 100. Furthermore, the portion of the belt webbing segment 23 which is folded back on the belt loop 4 also extends through the through-opening 8 and is directly sewn to the belt webbing 100 only in the overlap region and via the bottom layer 10 of the belt webbing segment 23.

[0041] The belt tongue 1 is therefore fixed in the following manner: The belt webbing 100 is first threaded through the through-opening 8 of the belt tongue 1. The belt webbing segment 23 is then placed on the belt webbing 100 with the folded-back portion through the through-opening 8. In order to fix the belt tongue 1 to the belt webbing 100, the free end of the portion through the through-opening 8 is sewn to the belt webbing 100 or to the bottom layer 10. As an alternative, it is also possible to pre-fix the belt tongue 1 to the belt loop 4 by introducing the belt webbing segment 23, folding it back and sewing the belt loop 4, and then to fix the belt tongue together with the belt loop 4 to the belt webbing 100 by introducing the belt webbing 100 through the through-opening and sewing the belt loop 4.

[0042] The belt tongue 1 can preferably be fixed to the belt webbing 100 at an angle of 5 to 20 degrees to the longitudinal extent of the belt webbing 100, which on the one hand facilitates the grasping of the belt tongue and on the other hand improves the geometry of the belt webbing 100 in the working position of the belt device. This can be achieved, for example, by arranging the belt loop 4 at an inclined angle on the belt webbing 100, by orienting the deflection tab 6 at an inclined angle to the longitudinal extent of the belt webbing 100, or by designing the belt loop 4 accordingly in an inclined shape.

[0043] The safety belt webbing 100 is designed as a single safety belt webbing 100, the free ends of which can be wound on one safety belt retractor each. For the installation of the safety belt webbing 100, first one end of the safety belt webbing is connected to the safety belt axle of the first safety belt retractor. Subsequently, the safety belt webbing 100 is threaded through the safety belt tongue 1, and the safety belt tongue is fixed on the safety belt webbing 100. Finally, the remaining free end of the safety belt webbing 100 is connected to the safety belt axle of the second safety belt retractor.

Claims

1. A vehicle safety belt device, comprising: - a lap belt (3), one end of which can be wound around the first seat belt retractor, and - a shoulder belt (2), one end of which can be wound around a second seat belt retractor, and - a seat belt buckle that can be fixed to the vehicle, wherein - the waist belt (3) and the shoulder belt (2) are equipped with a common safety belt tongue (1), which can be detachably locked in the safety belt buckle, characterized in that - the waist belt (3) and the shoulder belt (2) are formed from different parts of a single safety belt body (100), wherein The safety belt tongue (1) is fixed to the safety belt body (100), and the safety belt body (100) is divided into parts forming the shoulder belt (2) and the waist belt (3).

2. The seat belt device according to claim 1, wherein: - the safety belt tongue (1) has a tongue body (30) including a through opening (8), and - the tongue body (30) has a deflector (6) on one side of the through-opening (8) and a locking tongue (5) on the other side of the through-opening (8), wherein the safety belt body (100) extends through the through-opening (8), and the deflector (6) and the locking tongue (5) are arranged on different sides of the safety belt body (100).

3. The seat belt device according to claim 2, wherein: The safety belt tongue (1) is fixed to the side of the safety belt body (100) away from the safety belt buckle when the safety belt tongue (1) is in the locked position through the deflection plate (6).

4. The seat belt device according to any one of claims 1 to 3, characterized in that: The safety belt tongue (1) has a deflection piece (6) and is fixed by means of the deflection piece (6) in a safety belt loop (4) sewn on one side to the safety belt body (100).

5. The seat belt device according to claim 4, wherein: The safety belt loop (4) is formed by a folded-back safety belt body section (23), wherein the safety belt body section is sewn to the safety belt body in the folded-back portion by a first stitch (12) to form a three-layer overlapping portion (14).

6. The seat belt device according to claim 5, wherein: - The folded back portion of the safety belt loop (4) extends beyond the three-layer overlapping portion (14) with an end portion (16) and passes through a second stitching line (13) in the end portion (16) The double-layer overlapping portion (15) is sewn together with the safety belt body.

7. The seat belt device according to claim 4, wherein: - the safety belt loop (4) is formed by a safety belt body section (23), one end of the safety belt body section has a protruding extension (17) with a width smaller than the safety belt body section (23), and the other end has a cutout (18) with a width equal to or larger than the extension (17), wherein the safety belt body section (23) passes through the extension (17) The safety belt loop (4) is formed by folding back into the incision (18) and sewing with at least one stitch (21, 22), which connects the edge portions (19, 20) of the extension (17) and the safety belt body section (23) defining the incision (18) to the safety belt body (100).

8. A seat belt device according to claim 2, or any one of claims 3 to 7, when related to claim 2, characterized in that The through-opening (8) is delimited on the side opposite the deflector blade (6) by two edge sides (24, 25) extending conically outwards relative to the through-opening (8) and extending towards each other.

9. The seat belt device according to claim 2 or any one of claims 3 to 8, characterized in that: - the locking tongue (5) has a locking notch (7) for engaging with a locking element of the safety belt buckle, and - The locking notch (7) and the through-opening (8) are connected to each other.

10. The seat belt device according to claims 8 and 9, characterized in that The conically facing edge sides (24, 25) of the through-opening (8) are connected to the edge sides of the locking notch (7).

11. The seat belt device according to any one of claims 1 to 10, characterized in that: The safety belt tongue (1) is fixed to the safety belt body (100) in such a manner that it is oriented at an angle of 5 to 20 degrees relative to the longitudinal extension of the safety belt body (100).

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