Bracket for a rear seat system of a motor vehicle

Abstract

A holder (5, 6) for a backrest (1) of a rear seat assembly of a motor vehicle, which is fixedly attached to a vehicle structure and detachably and / or relatively movably attached to the backrest (1), wherein the holder (5, 6) has a sheet metal part having two aligned, outwardly extending tabs (5b) for attachment to the vehicle structure, extending from the inner end of the tabs (5b) two obliquely converging leg sections (5d) and a flat section (5a) connecting the leg sections, characterized in that the holder (5) has a bracket section (5') extending from the flat section (5a), which can be locked in a backrest lock (12) of a backrest (1), and a slot (5e) is provided in the sheet metal part of the holder (5), which extends at least across the flat section (5a) transversely through the bracket section (5') to, within, or to the end of the leg sections. (5d) extends.

Description

[0001] The invention relates to a holder for a rear seat system of a motor vehicle.

[0002] The second or, where applicable, first rows of seats in vehicles are generally designed with a multi-part backrest. A common configuration is one in which part of the backrest extends across two seats.

[0003] EP 1 916 440 A2 discloses a structural component made of fiber-reinforced thermoplastic. This component comprises a continuous fiber strand extending to a force application point and a compact metallic deformation element, which serves as a holder and is connected to the structural component at the force application point and to a supporting structure at a connection point. The deformation element undergoes plastic deformation over a deformation path when an impact load L(t) acting on the structural component generates a force F11(t) at the force application point that exceeds a threshold value. This threshold value is chosen such that a defined maximum impact load is absorbed without the structural component breaking, and the impact energy is partially dissipated by the plastic deformation energy of the deformation element.

[0004] The invention is based on the objective of providing an optimized holder for a backrest. This objective is achieved according to the invention by a holder with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0005] According to the invention, a bracket for the backrest of a rear seat assembly of a motor vehicle is provided, comprising a sheet metal part with two aligned, outward-extending tabs for attachment, extending from the inner end of the tabs, two obliquely converging leg sections, and a flat section connecting the leg sections. The sheet metal part can, for example, be designed as a stamped sheet metal bent part; however, any other manufacturing process by forming and, if necessary, primary forming is also possible. The bracket can be rigidly connected to the vehicle structure. The backrest can be detachably and / or movably connected to the bracket relative to it.

[0006] Preferably, a slot is provided in the sheet metal part of the holder, which extends at least over the flat area transversely through the bracket area to, into or to the end of the leg areas, particularly preferably to about the middle of the leg areas.

[0007] Particularly preferably, the sheet metal part of the holder has at least one bead extending across its entire width in the leg area, especially if this bead is mirrored in both leg areas. This bead increases the possible deformation path while ensuring the holder does not break, which offers particular advantages with regard to the required installation space.

[0008] An angle of 100° to 140°, and particularly preferably 120° ± 10°, is preferably provided between one of the outwardly extending tabs and the adjacent leg area. Such a design enables advantageous deformation paths in the event of both elastic and plastic deformation during a crash, especially in conjunction with a suitably designed backrest.

[0009] Such a holder, which preferably interacts with an upper attachment point of the backrest, preferably has a bracket area which can be locked in a backrest lock.

[0010] A holder, which preferably interacts with a lower attachment point of the backrest, preferably has a receptacle which has a rectangular area arranged within one of the leg areas and an area ending in a radius at the end, wherein the center of the radius is located in the middle of the flat area.

[0011] Preferably, a backrest is provided in conjunction with the holder, in particular for a rear seat system of a motor vehicle, which has a shell having a width extending over at least two seats and has at least two lower and at least one upper attachment point, wherein the shell has a base matrix made of a thermoplastic material and is designed with a support structure having a shape which completely surrounds the backrest on two adjacent sides and partially directly adjoins it on each of the adjoining sides, and is arranged obliquely from the common corner of the adjacent sides completely surrounded on the outside by the support structure to the end of the side partially surrounded by the support structure, which ends in the area between the seats, and the support structure connects the three attachment points together.In this process, the brackets support the stiffness profile of the backrest, which is influenced by the supporting structure.

[0012] A backrest designed in this way is suitable, among other things, for holding back cargo located in the trunk, especially in the event of a crash.

[0013] Polypropylene and polyamide are particularly suitable materials for the base matrix, which is made of a thermoplastic polymer. The polymers of the base matrix can be reinforced (throughout or in certain areas) with short and / or long fibers.

[0014] Reference is made to fibers with a length of less than 1 mm as short fibers, with a length of 1 to 50 mm, particularly preferably with approx. 20 mm, as long fibers and with a length of more than 50 mm as continuous fibers.

[0015] The supporting structure is formed, at least in some areas, by ribs that project to the rear.

[0016] In particular, the shell preferably has a profile that is open at least partially to the rear.

[0017] A rear shell can be attached to the outer shell from behind. The rear shell serves to close the profile, so that, in particular through the parallel ribs in conjunction with the rear shell, a closed hollow profile with correspondingly improved properties in terms of bending and torsional stiffness is formed.

[0018] The rear shell is preferably formed from a base matrix of thermoplastic material with or without short and / or long fiber reinforcement. This gives the rear shell sufficient stability to withstand loads in the ground position without damage.

[0019] In addition to the structural ribs formed on the shell, further ribs may be provided on the shell. However, these differ in their dimensions (especially height and thickness), their construction (e.g., embedding of reinforcements in the base matrix), and / or their arrangement (e.g., spacing of two parallel ribs, transverse ribs). Particularly with regard to their function in relation to potentially adjacent, parallel ribs, the section moduli against bending and torsion of the structural ribs are greater than those of the other ribs that do not belong to the structural system. For example, transverse, individual ribs may be provided to maintain the distance between the shell and the rear shell and do not belong to the structural system.

[0020] The supporting structure preferably has continuous fiber reinforcement, in particular continuous fibers embedded in the material of the base matrix of the remaining part of the shell.

[0021] Alternatively or in conjunction with this, inserts made of a semi-finished product made of a long and / or continuous fiber-reinforced plastic can be embedded in the base matrix and / or the semi-finished product can be at least partially surrounded by the base matrix.

[0022] Such an insert can be a C-shaped, in particular wound, tube that extends over a section of the supporting structure.

[0023] The insert can alternatively be made of another material, in particular a metal, preferably steel. These inserts can be bonded to the base matrix by material bonding, form bonding, and / or force bonding.

[0024] The semi-finished product preferably forms at least one bolt-shaped area which can interact with a holder. This area can be formed by appropriate deformation of the semi-finished product, but also in any other way.

[0025] Even in the case of a shell design without semi-finished products, at least one bolt-shaped area in the form of a pivot bearing bolt can be formed on the shell, which is formed, for example, from continuous fiber-reinforced material of the supporting structure.

[0026] The base matrix material, in particular polypropylene and polyamide, can also be provided with short and / or long fibers, but continuous fibers are preferably arranged exclusively in the area of ​​the supporting structure.

[0027] The shell preferably has a receptacle for a backrest lock in the area of ​​the upper attachment point. This receptacle can be open at the top, allowing the backrest lock to be inserted in a form-fitting manner. An opening is provided in the side of the shell, through which, for example, a bracket of a vehicle-structure-mounted holder can be inserted and locked into the backrest lock.

[0028] Particularly preferred is the reinforcement of the mounting by a semi-finished product that at least partially surrounds the mounting and forms part of the supporting structure. This allows forces to be easily transferred from the backrest into the vehicle structure, enabling the most uniform possible force distribution across the supporting structure in the backrest area, thereby absorbing and distributing peak loads. Preferably, the semi-finished product is arranged in a band-like manner in or around the material forming the mounting, and the band extends in the upper area of ​​the backrest to the other side of the seat, where it is connected to the upper end of the sloping section of the supporting structure. This band-like section of the semi-finished product preferably encloses the backrest lock arranged in the mounting over its entire circumference.Particularly preferably, two band-like areas are provided, wherein one area is arranged above and one area below a locking opening into which a part of a vehicle structure-fixed holder can be inserted.

[0029] The backrest preferably has an opening designed as a pass-through, which is closed by a suitable component when used as a seat or in the floor position.

[0030] The opening is located on the side of the backrest opposite the upper attachment point.

[0031] Optimal backrest strength is achieved when the opening on the back of the shell is surrounded by a rib that is connected, at least in one upper corner, to the supporting structure formed by further ribs. While the rib surrounding the opening does not form part of the actual supporting structure, it is directly connected to it, allowing forces to be transferred.

[0032] The outer upper corner and the inner lower corner of the shell can be connected by an additional rib. This rib does not (significantly) contribute to increasing stiffness, but merely ensures the distance between the shell and the back shell. This additional rib can, for example, be thinner than the ribs of the supporting structure. Furthermore, this additional rib can, for example, be made entirely of the base matrix material, while the ribs of the supporting structure can be reinforced with fibers. Alternatively, other spacers can be provided, such as intersecting ribs, pins, cylinders, hollow cylinders, or honeycomb structures.

[0033] In a preferred embodiment, the additional rib crosses the obliquely running ribs of the supporting structure in the form of a transverse rib.

[0034] The inclined section of the supporting structure is preferably formed by two spaced-apart ribs running side by side, with a winding mechanism for a safety belt optionally arranged at the upper end between the ribs. The spaced-apart ribs preferably run parallel to each other, at least in a partial section. They can be connected to each other at regular or irregular intervals by transverse ribs, which do not necessarily have to be as high as the ribs along their entire length.

[0035] Preferably, the intended deformation or fracture point is formed on one of the ribs. This point can be created by material weaknesses and / or openings, such as perforations. The arrangement of these weaknesses and / or openings is preferably concentric to the central longitudinal axis of the bolt-shaped area.

[0036] The backrest attachment preferably has a screw bolt, which forms the bolt-shaped section and is screwed into a threaded bushing. Particularly preferably, the threaded bushing is arranged to be longitudinally displaceable within a guide sleeve. This ensures a predetermined direction of movement in the event of overload of the backrest attachment.

[0037] The guide sleeve is preferably arranged in the ribs of the backrest at least at both ends. The guide sleeve can be easily cast into the material during the manufacturing process of the backrest, particularly one of its shells. Subsequent installation is also possible.

[0038] The threaded bushing preferably has a flange area which is in contact with a transverse rib, wherein the flange area is arranged adjacent to the predetermined deformation or fracture point formed in this transverse rib.

[0039] The invention is explained in more detail below with reference to several exemplary embodiments illustrated in the drawing. The drawing shows...

[0040] Fig. 1 a perspective view from an oblique front view of a backrest of a rear seat system with a backrest connection according to the first embodiment,

[0041] Fig. 2 a schematic representation of the supporting structure,

[0042] Fig. 3 a slightly perspective view of the shell of a backrest with an alternative backrest lock connection,

[0043] Fig. 4 a rear view of the shell of a backrest with another backrest lock connection,

[0044] Fig. 5 a perspective detail view of detail V of Fig. 4 with a holder according to the first embodiment,

[0045] Fig. 6 a detailed view of Detail VI of Fig. 4,

[0046] Fig. 7 a slightly perspective view of the shell of a backrest with another backrest lock connection,

[0047] Fig. 8 a detailed view of Detail VIII of Fig. 7,

[0048] Fig. 9 a detailed view of a corner area of ​​another backrest,

[0049] Fig. 10 an exploded, perspective view of a backrest from behind, wherein the backrest has a rear shell attached from behind,

[0050] Fig. 11 a schematic representation of a vehicle seat of a rear seat system,

[0051] Fig. 12 a detailed view of an upper attachment point of the backrest to the vehicle structure showing a vehicle structure-fixed holder cooperating with the backrest lock, which corresponds to the holder according to the first embodiment,

[0052] Fig. 13 a cutaway view of the lower corner area of ​​a backrest with a schematic representation of the structure of a backrest connection,

[0053] Fig. 14 a perspective view of the lower corner area accordingly Fig. 13 before a deformation,

[0054] Fig. 15 the corner area of Fig. 14 after plastic deformation,

[0055] Fig. 16 a side view of the holder according to the first embodiment,

[0056] Fig. 17 a top view of the holder of Fig. 16,

[0057] Fig. 18 a perspective view of the holder of Fig. 16,

[0058] Fig. 19 a variant of the holder of Fig. 16,

[0059] Fig. 20 a perspective view of the holder of Fig. 19,

[0060] Fig. 21 a second variant of the holder of Fig. 16,

[0061] Fig. 22 a third variant of the holder of Fig. 16,

[0062] Fig. 23 a fourth variant of the holder of Fig. 16,

[0063] Fig. 24 a fifth variant of the holder of Fig. 16,

[0064] Fig. 25 a lower holder with attachment point, and

[0065] Fig. 26 the holder of Fig. 25.

[0066] The directional terms used below are defined by the normal installation situation in a vehicle, with the backrest in a position suitable for sitting. The normal driving direction corresponds to "front".

[0067] A backrest 1 one in Fig. 11 schematically depicted rear seat system of a motor vehicle has a shell 2 on, whereby the shell 2 It is equipped with padding and a cover. Naturally, any elements that increase comfort and / or safety can be integrated into the padding, such as inflatable air cushions, airbags, ventilation, or air extraction. The backrest 1 It is designed for two seats.

[0068] The shell 2according to Fig. 1 is a single piece with a multiple of ribs. 4 formed supporting structure 4' on their rear side. Fig. Figure 2 shows a highly schematic representation of the course of the supporting structure. 4' , which also applies to the backrests described later 1 applies.

[0069] On the shell 2 Attachment points A are provided at the top and bottom, to which brackets can be attached laterally. These brackets, which will be discussed later, allow the shell to be attached. 2 to the vehicle structure, which is not shown here.

[0070] The supporting structure 4' surrounds the backrest 1 on two adjacent sides completely and on each of the adjoining sides partially directly adjoining. Furthermore, the supporting structure 4'from the common corner of the adjacent, completely outside the supporting structure 4' surrounding sides running diagonally to the end of the partially supporting structure, which terminates in the area between the seats. 4' arranged around the surrounding side. Furthermore, the supporting structure connects 4' the three connection points A together.

[0071] As in Fig. 1. The upper outer corner of the shell is recognizable as the upper outer corner. 2 as an open-ended recording 11 trained, into which said back lock 12 is used, which is connected to the upper holder 5 interacts. In relation to the geometry of the recording. 11 per se, the representation of Fig. 8 referred to, which only relate to the design of the support structure 5' from the representation of Fig. 1. The recording 11It is rectangular tube-shaped, open at the top, and extends over the top of the backrest. 1 designed to project upwards, with a reduction in cross-section downwards to limit the insertion depth of the backrest lock. 12 is planned. The backrest lock 12 is essentially form-fitting into the inlet from above. 11 inserted and secured in the same, for example by means of friction-fit elements. The locking area 12' (cf.) Fig. 8) of the leaning lock 12 It protrudes into the area with a reduced cross-section, at the height of a locking opening. 13 ends, through which of the said brackets 5' formed locking area of ​​the upper holder 5 into the back lock 12 inserted and in the same to secure the upright position of the backrest 1 can be locked.

[0072] The front panel, positioned at the front, is designed for optimal comfort in the area of ​​the outer seat. This area is contoured in such a way that a relatively thin layer of foam is required, thus saving foam material. In the area of ​​the middle seat, the front panel is flat, with an opening. 8 It is provided with a rectangular cross-section, which can be closed by an element not shown. The entire front of the shell 2 It has a generally smooth surface to which the padding can be attached. Certain contours may be incorporated into this smooth surface to secure a foam component.

[0073] The shell 2 according to the backrests described here and below 1It consists of a thermoplastic base matrix, in this case polyamide, or, according to one variant, polypropylene. The base matrix can be fully or at least partially reinforced with short or long fibers. In the area of ​​the supporting structure 4' Continuous fiber reinforcements are also conceivable.

[0074] Alternatively, or in combination with continuous fibers, long- and / or short-fiber reinforcements and / or metallic inserts can also be used in the supporting structure. 4' possible. Likewise, with suitable design, reinforcements in the form of inserted materials, such as fibers or metal elements, can be omitted, i.e., only the material of the base matrix is ​​required.

[0075] Fig. 3 shows a second backrest 1 In this case, the same reference symbols are used for identical or equivalently acting elements as in the first embodiment. The supporting structure 4' the shell 2according to the backrest 1 from Fig. 3 consists, at least predominantly, of a base matrix that does not have continuous fiber reinforcement and does not require overmolded metallic inserts. The rib profile 4 on the back of the bowl 2 It essentially corresponds to that of the first embodiment, however, it has additional transverse ribs. 4c provided between the rib groups extending along the sides and diagonally, running parallel to each other, to increase stability.

[0076] Fig. 4 to Fig. 6 show as the third backrest 1 another backrest, in contrast to the second backrest described previously. 1 modified shell 2 The supporting structure is... 4' the shell 2 according to Fig. 4– Fig. 6 designed as a hybrid component, comprising a base matrix and an endless fiber-reinforced long-fiber thermoplastic semi-finished product, hereinafter referred to as semi-finished product 9 This refers to something that is firmly embedded in the base matrix. The semi-finished product is used in this process. 9 for example, transverse ribs 4c , which are formed from the basis matrix, completely or partially enclosed.

[0077] The semi-finished product 9 absorbs forces and moments occurring in the load-bearing structure, particularly in the event of a crash. 4' on.

[0078] Here, the reinforcement runs between the bolt-shaped areas. 7 for the lower brackets not shown here, which themselves are also made of the semi-finished product 9 are formed (see Fig. 6), in the area of ​​an obliquely running reinforcing rib 4'' , whose function is completely fulfilled by the semi-finished product 9is taken over in the area of ​​the upper side of the backrest between the outside, where the attachment of an upper holder is located. 5 (see Fig. 5) through the semi-finished product 9 is reinforced, and the inside of the outdoor seat, where a winding mechanism is located. 10 a safety belt on the back of the shell 2 appropriate.

[0079] Furthermore, a through the semi-finished product 9 formed reinforcement between the inner bolt-shaped area 7 and the inner lower corner of the opening 8 provided, wherein the bolt-shaped areas 7 directly through the semi-finished product 9 are formed. The semi-finished product 9 stands, as if from Fig. 6 is evident, in the area of ​​the bolt-shaped area 7 laterally, with the individual strands of the semi-finished product 9 embedded by individual ribs 4are arranged in a continuous pattern. The bolt-shaped areas 7 are formed directly from the converging strands of the semi-finished product through appropriately reshaped areas. 9 educated.

[0080] Alternatively, instead of or in addition to the continuous fiber-reinforced thermoplastic semi-finished product, a metallic reinforcement, especially made of steel, may be provided.

[0081] Additionally, an obliquely running rib is formed from the material of the base matrix. 4e provided, which extend in line with one of the transverse ribs 4c the diagonally running reinforcing ribs 4'' and the semi-finished product 9 below the opening 8 extends. This rib 4e serves only to increase the distance between shell 2 and a cover or a possibly attached back shell (see Fig. 10) to ensure and has no function in relation to the stiffness of the backrest 1 .

[0082] As from Fig. As can be seen in section 5, the upper outer corner of the bowl is visible. 2 as an open-ended recording 11 trained, into which a back lock 12 (cf.) Fig. 8) is used. In the area where a bracket is used. 5' of the vehicle structure-fixed upper bracket 5 The straps, which can be inserted into the backrest lock, are band-like, located above and below the bar. 5' two through the semi-finished product 9 formed bands 9' into the recording 11 embedded between the ribs 4 and partially cast into the ribs 4 , which are formed from the base matrix, extending to the outer reinforcing rib 4'' are guided and integrally connected to it. The bands 9' They serve in particular to absorb and transmit tensile forces from the connection point between the backrest lock and the backrest.

[0083] In the case of this backrest described above 1 This will thus form the supporting structure 4' both through ribs formed from the base matrix 4 , which are essentially located in the area of ​​the sides of the shell 2 are arranged in a continuous pattern, as well as through the semi-finished product 9 formed, which is partly parallel and partly oblique to the ribs 4 proceeds, whereby the semi-finished product 9 is embedded in the basic matrix.

[0084] According to the fourth, in Fig. 7 and Fig. 8 backrests shown 1 is in turn a hybrid component as a shell 2 provided for, in the present case a coiled tube 19 The tube is embedded in the base matrix in a C-shaped form. 19 again, wholly or partially through the ribs 4 enclosed by the base matrix. The tube 19It is located only on the outside of the outer seat, between the two inner ribs. 4 is arranged in a continuous pattern, with its two ends running approximately parallel to the horizontally running ribs. 4 extend the pipe 19 This particularly affects torsional moments in this area of ​​the supporting structure. 4' up. The coiled tube 19 can thereby enter the basic matrix of the shell 2 be embedded as per the present backrest 1 provided for. Alternatively, the pipe 19 of ribs 4 , which are formed from the basis matrix, may be wholly or partially enclosed.

[0085] In addition to the reinforcing ribs that run diagonally from the outside bottom to the outside seat side inwards. 4'' is a single rib 4e from the outside top to the inside bottom, approximately in the middle under the opening 8 The rib is planned to run.4e This in turn serves solely to maintain distance between the shell 2 and a cover or a back shell that may be attached 3 (cf.) Fig. 10) and has no relevant function with regard to stiffness in this case.

[0086] Even in the case of this bowl 2 There is a recording at the top end of the outside. 11 for a back lock 12 trained. This recording 11 can be designed accordingly in all backrest designs, including reinforcing structures, such as in the backrest described second. 1 , can be embedded. The choice of material for the base matrix (entirely or only in this area) and any fiber materials used can also influence dimensional stability and load-bearing capacity. The absorption 11It is rectangular tube-shaped, open at the top, and extends over the top of the backrest. 1 designed to project upwards, with a reduction in cross-section to limit the insertion depth of the backrest lock 12 is planned. The backrest lock 12 is inserted into the holder from above in a form-fitting manner 11 inserted and secured in the same, for example by means of friction-fit elements. The locking area 12' of the leaning castle 12 It protrudes into the area with a reduced cross-section, at the height of a locking opening. 13 ends through which a bar is attached 5' formed locking area of ​​an upper holder 5 into the back lock 12 inserted and in the same to secure the upright position of the backrest 1 can be locked. Fig. Figure 12 shows an example of a perspective view of a photograph. 11without backrest lock and the one in the locking opening 13 arranged brackets 5' the holder 5 .

[0087] Fig. Figure 9 shows a lower outer corner of a bowl 2 according to the fifth backrest 1 , where the part of the shell not shown 2 in this case essentially that of the second backrest 1 It corresponds, but can also be shaped differently. Here, the bolt-shaped area is... 7 via a fan-shaped rib structure with arc-shaped connecting ribs in its connection to the supporting structure 4' reinforced. Furthermore, on the outside of the bolt-shaped area 7 Support ribs distributed around the circumference 7' arranged. The connection point is located in the area of ​​the shell. 2 molded from the material of the thermoplastic base matrix, which is reinforced with short and / or long fibers.

[0088] Fig. Figure 10 shows a view of a backrest 1 , which is a rear shell 3 features. The rear shell can be used in this case. 3 It may be covered, but a decorative tray may also be provided, or a decorative surface may be formed directly on its back. The back tray 3 It features suitable contours for attaching padding / fabric and corrugations for increased load-bearing capacity of the loading floor. The rear shell 3 According to the present embodiment, the material consists of a thermoplastic base matrix, in this case polyamide, or in a variant, polypropylene, which is fiber-reinforced. Long fiber reinforcements are provided in this embodiment. Alternatively, or in combination with long fibers, short fiber reinforcements are also possible, or the fiber reinforcement can be omitted entirely.

[0089] The outermost rib 4 the shell 2This serves in particular to complete the profile after assembly with the rear shell. 3 , which has a corresponding, surrounding rim. The bowl 2 and rear shell 3 are located in the area of ​​the free end of the ribs 4 firmly connected to each other, with the connection areas on the rear shell 3 in Fig. Figure 10 is represented by dashed lines. The connection is currently achieved by ultrasonic welding, but the two shells can be joined in any other suitable way, in particular by material and / or form-fitting, but also by force-fitting, for example by other welding processes, by gluing or by interlocking, whereby the protruding areas can also be used for a material-fitting connection after positioning. One of the openings 8 in the bowl 2A corresponding opening is also located in the rear shell. 3 trained.

[0090] A rear shell can be used with all backrests described here. 1 This is intended to be the case. The shell includes the basic supporting structure (see [reference]). Fig. 2) If a rear shell is provided, it closes any rearward-opening profile of the shell. To ensure the distance between the shell and the 2 and rear shell 3 In this case, spacers can be provided, for example in the form of ribs. 4e , as for example in Fig. 4 and Fig. Figure 7 is shown. Any other suitable elements can also serve as spacers.

[0091] Furthermore, the shell 2 upper holders 5 and lower brackets 6 attached laterally, which connects the shell 2to a vehicle structure not shown here. The holders are 5 , 6 They are in turn firmly attached to the vehicle structure by means of screws not shown.

[0092] In the upper part of the backrest 1 In this case, there is only one holder on the outside of the vehicle. 5 intended, its design and function in conjunction with the backrest 1 This will be discussed in more detail later.

[0093] In the lower part of the backrest 1 There are two holders on opposite sides. 6 provided which bolt-shaped, aligned areas 7 the backrest 1 absorb, so that the backrest 1 to the bolt-shaped areas 7 The formed pivot axis is pivotable. Each of the lower brackets 6 is provided with a suitable receptacle into which the bolt-shaped area7 , the one attached to the shell 2 is formed, is received and is formed by providing an end flange on the bolt-shaped area 7 is secured here against axial displacements.

[0094] In the backrest 1 A rectangular opening serves as a pass-through. 8 designed with a pass-through for transporting long items without folding down the backrest 1 can serve this purpose. The ribs 4 on the back of the bowl 2 are arranged in such a way that around the opening 8 a single, circumferential rib, hereinafter referred to as the opening rib. 4a This opening rib is designated as such. 4a is connected to the supporting structure at its upper, outer corner 4' connected. The opening rib runs along this route. 4a only a small part of the opening is visible in the upper area. 8spaced apart, in this case extending from the innermost, interrupted circumferential rib 4b the supporting structure 4' It is arranged along the outside seating side. Furthermore, the opening rib 4a continued vertically downwards on the inside.

[0095] As from Fig. As can be seen in 10, (at least) three ribs run along each side. 4 the supporting structure 4' in the outer edge area of ​​the backrest 1 essentially parallel to each other, with the distance between the ribs 4 The outermost rib is smaller on the side facing the center of the vehicle than on the other side. 4 This serves in particular to complete the profile.

[0096] The circumferential ribs, arranged further inwards and essentially running parallel to each other, 4 are at least partially via transverse ribs 4cinterconnected. Furthermore, a fourth rib is located in the upper area above the outdoor seating area. 4d provided which above the outer corner of the opening 8 on a vertically running transverse rib 4c It ends. The ribs are in the two lower corners. 4 outwards via transverse ribs 4c continued, so that the ribs 4 cross to modify the structure in the area of ​​the lower attachment points, i.e., the lower brackets 6 , to reinforce.

[0097] Furthermore, slightly above the diagonals from the lower outer side to the upper center, or the outer upper corner of the opening, 8 essentially parallel to each other are two reinforcing ribs 4'' These reinforcing ribs are provided. 4''They thus run essentially diagonally across the contoured area of ​​the outdoor seating area and form an essential part of the supporting structure. 4' As can be seen from the drawing, in the area of ​​the supporting structure 4' at least two ribs running side by side, spaced apart 4 provided for, with transverse ribs 4c They may be provided between them. Such transverse ribs 4c are particularly at the outer ends of the supporting structure 4' and provided in the three corner areas where the connection points A are located. At the corner without a connection point, which is not integrated into the supporting structure. 4' Since it is integrated, there is no cross-connection between the ribs. 4 planned.

[0098] According to the backrest described here 1 is the supporting structure 4'open towards the back, however, a completely or partially closed design is also possible, especially in the area between the ribs. 4 , provided for, to which a rear shell may then be attached 3 (see Fig. 10) can be attached. Into the space between the shell 2 and the rear shell 3 The cavities created can be filled with insulating material, such as foam. Furthermore, this area can be used for the installation of actuators, electrical connections for seat heating, or similar devices.

[0099] Furthermore, on the back of the shell, in the upper area, a winding mechanism for a safety belt (not shown) for the middle seat is provided.

[0100] As in Fig. 10. The upper outer corner of the shell is recognizable in a hint of what is happening. 2 designed as an upwardly open opening into which a dovetail lock12 is used in the area where a bracket of the vehicle structure-fixed upper holder is located. 5 into the back lock 12 Insertable are ribs 4 the supporting structure 4' planned.

[0101] The materials of the base matrix of the shell and the back shell can differ; however, the same materials are preferably used for both. This is particularly advantageous with regard to a possible material-bonded connection between the shells.

[0102] With a fixed holder that is as dimensionally stable as possible even in the event of a crash, or possibly in combination with a holder 6 , which has predetermined deformation properties in the event of a crash, can deform the bolt-shaped area 7 as provided for in the Fig. 13 to Fig. 15 shown.

[0103] In the lower corner area of ​​the bowl 2 This is achieved by extending two vertically running ribs. 4 a guide sleeve 7a embedded with end flange areas. The outermost rib 4 is in the area of ​​the bolt-shaped region 7 interrupted.

[0104] Inside the guide sleeve 7a is a threaded bushing 7b Arranged in a sliding manner. This threaded bushing 7b extends further inwards, over the guide sleeve 7a outwards, up to a transverse rib arranged perpendicular to it 4c The threaded bushing 7b In this case, it ends more or less flush with the outermost rib. 4 adjacent to the bolt-shaped area 7 The threaded bushing 7d points to the inside, i.e., to the area of ​​the bolt-shaped part 7 far end, a flange area 7c on. This flange area7c is located at the aforementioned transverse rib 4c which, in addition to the continuations of the vertically running ribs 4 is planned. The transverse rib 4c is spaced slightly further apart than the two ribs 4 and also has a slightly smaller thickness in this case.

[0105] into the threaded bushing 7b is from the outside, through the interruption of the outermost rib 4 , a screw bolt 7d up to one on the screw bolt 7d The designed flange is screwed in. The screw bolt 7d together with the outer end, it forms the aforementioned protruding, bolt-shaped area. 7 , which is in a lower holder 6 can be positioned as in Fig. 10 indicated. The outer end of the screw bolt. 7d can be done via the holder 6 be both detachable and permanently connected to the vehicle structure, with the screw bolt 7dThe backrest is fixed to the vehicle in its usable position.

[0106] As from Fig. As can be seen in section 14, the transverse rib is 4c in the area adjacent to the flange area 7c the threaded bushing 7b running around it, it is provided with a plurality of openings, which form a predetermined deformation or fracture point. 14 forms. Of course, a different design of the intended deformation or fracture point is also possible, such as through perforation or material weakening.

[0107] In a frontal crash with a person seated inside, the backrest presses down. 1 with the guide sleeve 7a forwards, whereby the screw bolt 7d is firmly attached to the vehicle structure. On the threaded bushing 7b and the screw bolt 7dThis creates a moment around the vertical axis. If the maximum permissible force, in this case 5 kN, is exceeded, the predetermined deformation or fracture point and the threaded bushing break. 7b moves to the inner flange of the guide sleeve 7a , where it is stopped. This causes the screw bolt to travel. 7d according to the movement path of the threaded bushing 7b outwards, with a certain pivoting movement around the vertical axis. The backrest 1 It moves forward and simultaneously curves around the vertical axis.

[0108] A corresponding behavior of the intended deformation or fracture point 14 This also occurs in the event of a frontal crash involving a load in the area behind the vehicle seat, which rests on the backrest. 1 presses. Even in the event of a rear-end collision with a person inside the vehicle, a corresponding behavior of the intended deformation or fracture point can occur. 14appear.

[0109] The above is a crash with complete material failure at the intended deformation or fracture point. 14 As described, however, the intended deformation or fracture point can also be designed in such a way that only at least partial plastic deformation of the material occurs without tearing, i.e., without fracture. Plastic deformation can also adequately dampen the impact. Of course, partial tearing can also be intended.

[0110] The design of the intended deformation or fracture point described above 14It can also be used with a different backrest structure. In particular, the ribs can be formed on a back shell instead of a shell, or the back shell can be omitted entirely, meaning the backrest can be a single shell. Furthermore, in addition to the aforementioned thermoplastic materials, other materials are also suitable, such as light metals, metals (e.g., steel), or composite materials.

[0111] Furthermore, if the backrest is designed and connected to the vehicle structure accordingly, such a predetermined deformation or fracture point can also be located elsewhere, for example at the top instead of at the bottom, as described above.

[0112] All of the above-described configurations can advantageously be combined with the holders described below; however, the use of the holders is not limited to these configurations described above.

[0113] The following refers to the upper attachment point A of the shell. 2 , which also includes the in Fig. 12 backrest locks not shown for clarity 12 includes, in conjunction with the upper holder 5 This was discussed in more detail. One possible direction of stress, when considering... Fig. 12, looking diagonally to the right and rear. The holder 5 , which also in the Fig. 16 and Fig. As shown in 17, the aforementioned bracket 5' , which is located in a flat area 5a the holder 5is arranged vertically projecting, and has a section formed as a sheet metal part, in this case produced from a sheet metal part by means of punching and forming, which has two mutually aligned, outward-extending tabs. 5b with mounting holes 5c , two thigh areas that slope diagonally towards each other 5d and has the aforementioned flat area connecting the thigh sections. There are a total of three fastening openings. 5c provided, with two attached to the tab arranged above 5b and one located centrally in the tab at the bottom 5b is arranged. From approximately the middle of the thigh areas 5d Starting point is a slot 5e provided for, which covers the flat area 5a It runs and serves to relieve pressure. The slot 5e Alternatively, it can also be designed to run only in the flat area. The holder 5is firmly attached to the vehicle structure by means of screws not shown. The backrest lock 12 The backrest locks in the ready-to-seat position. 1 the iron 5' To move the vehicle seat to the floor position or, if necessary, to roll it up, the backrest lock is used. 12 loosened and the top of the backrest 1 so released.

[0114] In the event of stress, especially in a crash, the parts of the holder are subjected to a certain predetermined force F. 5 including the hanger 5' The backrest only deforms below its maximum plastic deformability. This results in controlled elastic deformation and thus a corresponding path along which the backrest lock can move. By providing for controlled deformation, the maximum forces occurring at the load nodes / connection points of the backrest can be managed. 1This can be reduced. The design of the thigh areas has a significant influence on this. 5d and the flat area 5a , especially in connection with the slot 5e The angle between the tabs 5b and the thigh areas 5d In this case, it is 115°. It is preferably in the range of 100° to 140°, particularly in the range of 120° + / - 10°.

[0115] The Fig. 19, Fig. 20 and Fig. 21 show variations of the holder 5 , where the hanger 5' only partially shown. Here too, the sheet metal part forms a kind of trapezoidal cavity, with a groove in each of the sloping legs. 5f is provided for, which in the case of the Fig. 19 and Fig. The variant shown in 20 is shown externally in the case of the in Fig. The variant shown in 21 projects inwards. In both cases, a groove can be used instead. 5f Several beads may also be provided in the leg areas, resulting in a meandering structure. Beads can also be arranged in a continuous pattern in the flatter sections. The beads serve as load-reducing elements (in the case of overload, acting as a predetermined deformation point with plastic deformation), which distribute the reaction forces at the load nodes of the (plastic) backrest. 1 reduce. Although not apparent from the drawing, a slot may also be present in the case of the variants. 5e under the hanger 5' to be formed in a way that runs through the hindquarters.

[0116] The iron 5' a holder 5 It may also not be rectangular, but may have additional curves, as exemplified in Fig. 23 with an extension in the outer half and in Fig. Figure 24 shows an extension in the central area. Even in these cases, although not shown, the provision of a slot is indicated. 5e Advantageous. In this case, grooves can also be provided in the leg areas.

[0117] The thigh areas 5d and the flat, shallow areas 5a the holder 5 (and 6 In a crash, the body panels deform at least partially under overload. Depending on the direction of the load, this can, for example, result in stretching of the leg sections. 5d and in particular a bending of the edge areas of the flatly designed areas 5a This can occur. Any other deformations are of course also possible, depending on the load. The plastic deformation in the sheet metal part and / or bracket area can dampen the impact in the event of a crash.

[0118] Alternatively (or in conjunction with a deformation of the sheet metal part of the holder), a deformation of the bracket is possible. 5' possible. This could involve, for example, stretching the stirrup. 5' by selectively narrowing the cross-section of the stirrup. In this case, the slot in the sheet metal part can also be omitted, as shown in Fig. Figure 22 shows. Of course, combinations of deformation of the bracket and the sheet metal part with and without a slot are also possible.

[0119] By providing a slot 5e and / or from beads 5f and / or from possible constrictions of the bracket cross-section and / or deformations in the bracket area due to overloading, the stiffness of the holder can be determined. 5to influence the force-deformation path of the brackets in a targeted manner. This is essential to influence the force-deformation path of the brackets, whereby the targeted deformation affects the forces occurring at the load nodes, i.e., particularly in the area of ​​the attachment points of the backrest. 1 can be reduced.

[0120] The design of the lower brackets 6 With regard to the sheet metal part, this essentially corresponds to that of the upper brackets. 5 , so that in order to 1 Higher reference symbols with the corresponding additions for the individual areas are used. Unlike the holder. 5 is instead of the slot 5e a recording 6e to accommodate the previously described bolt-shaped area 7 planned. The recording 6e exhibits within one of the thigh areas 6d arranged rectangular area for inserting the flange area of ​​the bolt-shaped area7 and an end area terminating in a radius for the actual reception of the bolt-shaped area 7 on, with the center of the radius in the middle of the flat area 6a is arranged. The holder 6 is attached to the vehicle structure in such a way that the rectangular area for inserting the flange area is located at the top and the area with a radius is located at the bottom, with an inclined arrangement of the holder also being possible. 6 is possible, ensuring that the bolt-shaped area 7 not during normal use from the holder 6 reached.

[0121] In the event of a crash, the owner behaves 6 according to the holder 5 , whereby, for example, with a corresponding load direction, the originally flat area 6a is bent over in its edge areas, thereby reducing the leg areas6d They can be lengthened. Of course, any other deformations are also possible.

[0122] Even in the case of the owner 6 are the Fig. 18 and Fig. 19 corresponding designs of the thigh areas 6d possible. Reference symbol list 1 backrest 2 bowls 3 Rear shell 4th rib 4' supporting structure 4'' reinforcing rib (running diagonally) 4a Opening rib 4b innermost, interrupted circumferential rib 4c transverse rib 4d fourth rib 4th rib (running obliquely) 4f arc-shaped connecting rib 5 holders (top) 5' bracket 5a flat trained area 5b tab 5c Mounting opening 5d thigh area 5th slot 5f groove 6 holders (below) 6a flat trained area 6d thigh area 6th recording 7 bolt-shaped area 7' Support rib 7a Guide sleeve 7b Threaded bushing 7c flange area 7d screw bolt 8 Opening 9 semi-finished products 9' Band 10 Winding mechanism 11th entry 12 Backrest lock 12' locking area 13 Locking opening 14 Intended deformation or fracture point 19 coiled tube A connection point QUOTES INCLUDED IN THE DESCRIPTION

[0123] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0124] EP 1916440 A2

[0003]

Claims

[1] Holder ( 5 , 6 ) for a backrest ( 1 ) a rear seat system of a motor vehicle that is fixed to a vehicle structure and detachable and / or relatively movable on the backrest ( 1 ) can be attached, characterized by that the holder ( 5 , 6 ) a sheet metal part which has two aligned tabs extending away from each other ( 5b ) for attachment to the vehicle structure, starting from the inner end of the tabs ( 5b ) two thigh areas that run diagonally towards each other ( 5d ) and a flat area connecting the thigh areas ( 5a ) exhibits. [2] Holder according to claim 1, characterized in that in the sheet metal part of the holder ( 5 ) a slot ( 5e ) is provided, which extends at least over the flat area ( 5a ) across the ironing area ( 5') up to, into or to the end of the thigh areas ( 5d ) extends. [3] Holder according to claim 2, characterized in that the slot ( 5e ) across the ironing area ( 5' ) to the middle of the thigh areas ( 5d ) extends. [4] Holder according to one of the preceding claims, characterized in that the sheet metal part of the holder ( 5 , 6 ) in the thigh area ( 5d , 6d ) at least one groove extending across the entire width ( 5f ) exhibits. [5] Holder according to one of the preceding claims, characterized in that between one of the tabs extending away from each other ( 5b ) and the adjacent thigh area ( 5d , 6d ) an angle of 100° to 140°, in particular of 120° + / - 10°, is provided. [6] Holder according to one of the preceding claims, characterized in that the holder ( 5 ) starting from the flat area ( 5a ) an ironing area ( 5' ) which is located in a back lock ( 12 ) a backrest ( 1 ) is lockable. [7] Holder according to any one of claims 1 to 5, characterized in that the holder ( 6 ) a recording ( 6e ) exhibits one within one of the thigh areas ( 6d ) arranged rectangular area and an area ending at one end in a radius, wherein the center of the radius is in the middle of the flat area ( 6a ) is arranged. [8] Backrest support arrangement for a motor vehicle, comprising a backrest ( 1 ) with a bowl ( 2), which has a width extending over at least two seats, and has at least two lower and at least one upper attachment point (A), wherein the shell ( 2 ) has a base matrix made of a thermoplastic material, wherein the shell ( 2 ) with a supporting structure ( 4' ) is formed which has a shape which forms the backrest ( 1 ) completely surrounds two adjacent sides and partially directly adjoins each of the following sides, and from the common corner of the adjacent sides, completely outside the supporting structure ( 4' ) surrounding sides running diagonally to the end of the partially supported structure, which terminates in the area between the seats ( 4' ) surrounding side, and the supporting structure ( 4' ) connects the three connection points (A) together, and at least one, in particular three holders ( 5 ,6 ) according to one of the preceding claims, wherein the holders ( 5 , 6 ) firmly connected to the vehicle structure and detachable and / or relatively movable at the three attachment points (A) on the backrest ( 1 ) can be attached. [9] Backrest support arrangement according to claim 8, characterized in that the shell ( 2 ) in the area of ​​the upper connection point (A) a recording ( 11 ) for a back lock ( 12 ) exhibits. [10] Backrest support arrangement according to claim 8 or 9, characterized in that at least one of the lower attachment points (A) has a bolt-shaped area ( 7 ) for attachment to a holder ( 6 ) is provided, wherein the bolt-shaped area ( 7 ) on the shell ( 2 ) via an arrangement with a predetermined deformation or fracture point ( 14 ) is attached in such a way that the bolt-shaped area ( 7) in the event of a break at the intended deformation or fracture point ( 14 ) can be moved outwards.

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