vehicle seat

Abstract

Vehicle seat (1), comprising a backrest (3) and a headrest (4) arranged on the backrest (3), wherein the backrest (3) has a support structure (6) on which a seat cushion (7) and a seat cover (5) are arranged, and comprising a channel (9) for the passage of a safety belt (10) for a user of the vehicle seat (1), wherein the channel (9) has a substructure panel (14) concealed by the seat cover (5) and a belt exit panel (13) held on the substructure panel, wherein the substructure panel (14) has an end edge (23) located below the seat cover (5), to which an end edge (2) of the belt exit panel (13) is set back, and wherein the end edge (23) of the substructure panel (14) has a radius (R) that is larger than the radius (r) of the end edge (22) of the belt exit panel (13), characterized in that the Channel (9) extends through the backrest (3),and that the under-cabinet panel (14) is made of a foam part.

Description

[0001] The present invention relates to a vehicle seat with a backrest and a headrest arranged on the backrest, wherein the backrest has a support structure on which a seat cushion and a seat cover are arranged, and with a channel for guiding a safety belt for a user of the vehicle seat, wherein the channel has a base panel concealed by the seat cover and a belt exit panel which is held on the base panel, wherein the base panel has an end edge located under the seat cover, to which an end edge of the belt exit panel is set back, and wherein the end edge of the base panel has a radius which is larger than the radius of the end edge of the belt exit panel.

[0002] Vehicle seats of the type mentioned above are known from the prior art. For example, German patent application DE 10 2020 203 795 A1 discloses a vehicle seat with a backrest and a headrest, wherein a channel is formed in the headrest which can also be used to guide a seat belt. The channel is multi-part and has at least a base panel and a belt exit panel, which is set back from the base panel, the setback edge of which has a smaller radius than the end edge of the base panel. This ensures that the outer base panel meets the requirements of safety regulations, while the inner belt exit panel is visually enhanced by its smaller radii.

[0003] The present invention is based on the objective of creating an improved vehicle seat.

[0004] The problem underlying the invention is solved by a vehicle seat with the features of claim 1. This seat has, among other advantages, the benefit of improved ergonomics and safety aspects due to an advantageous arrangement of the channel on the vehicle seat. According to the invention, this is achieved by the channel extending through the backrest. While in the prior art the channel is located in the headrest, the channel is now situated in the backrest and thus in an area closer to the shoulder of a person sitting in the vehicle seat. This allows the seat belt to be advantageously guided through the channel over the person's shoulder, rather than exiting from a headrest in the user's head area. This increases user comfort and allows for greater design freedom in the headrest.

[0005] Preferably, the base panel is attached to a retaining element mounted on the backrest's supporting structure, which, together with the base panel, is enclosed by the seat cover. The base panel and the retaining element thus form a substructure that lies within or is encompassed by the seat cover, making it neither visible nor observable from the outside. This substructure forms the channel and also serves as a support structure for the belt exit panel itself. The multi-part design of the substructure offers the advantage that the base panel and the retaining element can each be optimally designed to meet their respective requirements, particularly with regard to the choice of material for each element.

[0006] Preferably, the belt exit cover is locked to the retaining element. This means the belt exit cover is attached to the retaining element rather than the substructure cover, offering further advantages, particularly for the substructure cover, whose design then does not need to be specifically tailored to the locking mechanism of the belt exit cover. For example, this allows the substructure cover to be manufactured from a material with a lower hardness than the retaining element, and in particular, a lower hardness than that required to hold the belt exit cover. Due to its reduced hardness, the substructure cover gains particularly advantageous safety properties through its flexibility, providing improved protection for a person seated in the vehicle in the event of an impact.Preferably, the substructure panel acts as a guide, in particular only as a guide, for the belt exit panel in order to advantageously align it with the backrest, but preferably does not have any features that lock the belt exit panel to the substructure panel and would cause the belt exit panel to be held back on the backrest.

[0007] Preferably, the belt exit cover is held on the retaining element by at least one elastically displaceable locking element. This allows the belt exit cover to be locked or clipped onto the retaining element during assembly, ensuring simple and quick installation. Preferably, the displaceable locking element is attached to the belt exit cover or to the retaining element and, in particular, is formed integrally with one of the two elements, the other element having a retaining structure that interacts with the locking element to provide a locking action. For example, the retaining element has a receptacle for the locking element as a counterpart element, into which the locking element engages during assembly.

[0008] According to a preferred embodiment of the invention, the retaining element is ring-shaped and forms the channel. This gives the retaining element improved stability and, in particular, allows for secure attachment of the belt exit cover.

[0009] Preferably, the substructure panel is made of a foam material. The foam material advantageously provides the aforementioned reduced hardness of the substructure panel, particularly compared to the retaining element and / or the belt exit panel, thus offering the aforementioned advantages for improved impact protection. In particular, it exhibits low hardness. Furthermore, the foam component offers the advantage that impact-resistant, especially head-impact-resistant, seam channels for seams or piping of the seat cover can be advantageously incorporated into the substructure panel. This facilitates the integration of the substructure panel into the seat cover and also advantageously enables the attachment of the seat cover to the substructure panel. It is particularly preferred that the seat cover be tensioned or clamped between the substructure panel and the belt exit panel in such a way that the belt exit panel is visible and the substructure panel is concealed.The locking connection between the belt exit panel and the retaining element is particularly preferably designed in such a way that the clamping force achievable through the locking connection is sufficient to fix the seat cover between the belt exit panel and the substructure panel.

[0010] Furthermore, it is preferably provided that the retaining element is made of plastic. This gives the retaining element increased load-bearing capacity, especially compared to the foam-based base plate, and ensures secure attachment of the belt exit plate to the vehicle seat. This secure attachment ensures, in particular, the clamping force for securing the seat cover, as described above, and the holding force for locking the belt exit plate in place. The plastic construction also allows for cost-effective manufacturing of the retaining element and permits complex shapes, such as the one-piece production of at least one, and in particular several, locking elements and / or corresponding counter-elements.

[0011] According to a further embodiment of the invention, the substructure panel and the retaining element, i.e., the substructure of the advantageous panel arrangement, comprising the substructure panel, the belt exit panel, and the retaining element, are made of plastic and are preferably formed in one piece. In this case, the substructure panel and the retaining element preferably have the same hardness, whereby the one-piece or one-piece design of the substructure reduces the number of parts and thus simplifies assembly.

[0012] According to a preferred embodiment of the invention, a belt guide is attached to the supporting structure and / or the retaining element, and is arranged on the side of the belt exit plate facing away from the end edge of the belt exit plate. The belt guide directs the belt, particularly towards the belt exit plate, in such a way that the forces transmittable by the belt to the belt exit plate are limited. This reduces the forces exerted by the seat belt on the belt exit plate and the substructure plate, thereby ensuring a long service life for the channel.In particular, the belt guide ensures that the belt exit cover, at the end furthest from its end edge and especially at the end located within the vehicle seat or backrest, is not subjected to a force that would push the belt exit cover outwards, i.e., towards the front of the backrest, and thus counteract the clamping force described above. This ensures that the holding force or clamping force of the belt exit cover on the retaining element is not unnecessarily counteracted by the seat belt. Furthermore, the additional belt guide reduces wear on the belt exit cover.

[0013] The belt guide is preferably made of metal. This allows for high load-bearing capacity and high belt tension forces of the seat belt. Thanks to the metal belt guide, the forces transmitted from the seat belt to the backrest are advantageously transferred directly from the belt guide to the supporting structure, thus preventing them from stressing the channel and, in particular, the belt exit cover or the base cover.

[0014] Further advantages and preferred features and combinations of features will become apparent in particular from the foregoing and from the claims. The invention will now be explained in more detail with reference to the drawings. To this end, we show... Fig. 1A to C an advantageous vehicle seat in different views, and Fig. 2A and B are sectional views of the vehicle seat.

[0015] Fig. 1A to C show in a perspective view ( Fig. 1A), in a pessimistic partial top view ( Fig. 1B) and in a perspective partial rear view ( Fig. 1C) An advantageous vehicle seat 1 for a motor vehicle 2 (not shown in detail here), which has this or several vehicle seats of this type. The vehicle seat 1 has a backrest 3, which is preferably associated with a seat section and pivotably mounted relative to it. Advantageously, the backrest has a headrest 4 at its upper end, which faces away from the seat section. The backrest 3 has a Fig. 1 seat cover not shown 5 (see for example Fig. 2A) as well as a support structure 6 and a seat cushion 7. The seat cushion 7 is attached to the support structure 6, and the seat cover 5 is stretched over the seat cushion 7 to protect it from external influences and to ensure a high-quality appearance. In a shoulder area 8 of the backrest 2, which is located in particular at an upper corner of the backrest 3 below the headrest 4, a channel 9 is formed for the routing of a safety belt 10.The channel 9 extends through the backrest 3 in such a way that the safety belt 10 can be guided from a safety belt tensioning device 11, which is held on the support structure 6 in the backrest 3 and which, for example, has a roller for winding up the safety belt 10 when not in use and / or a belt tensioner, to the front 12 of the backrest 2, which faces the seat and a person on the vehicle, and can be tensioned over the person and fastened to a belt buckle in the area of ​​the seat. The safety belt 10 is, in particular, a three-point belt.

[0016] The channel 9 is designed in multiple parts and includes a belt exit cover 13, a substructure cover 14, and a retaining element 15. The retaining element 15 is ring-shaped or partially ring-shaped and is attached, in particular, to the supporting structure 6 of the backrest 3. The seat cushion 7 has a recess 16 into which the retaining element 15 is inserted. The retaining element 15 has inherent rigidity that ensures that the shape of the backrest 3 is advantageously and permanently maintained in the shoulder area 8 by the retaining element 15. Furthermore, the retaining element 15 serves to hold the belt exit cover 13, as will be explained in more detail below.

[0017] Fig. 2A and Fig. 2B each show cross-sectional views through the backrest 3 in the shoulder area 8, wherein Fig. 2A represents a simplified sectional view and Fig. 2B an enlarged detail view of the section view of Fig. 2A.

[0018] The retaining element 15 is attached in particular to the supporting structure 6 of the backrest 3 and, as already mentioned above, is integrated into the seat cushion 7. The retaining element 15 forms at least part of the channel 9 and carries the belt exit cover 13. For this purpose, the retaining element 15 has in particular a locking element receptacle 17, which is designed to receive a locking element 18 of the belt exit cover 13.

[0019] The seatbelt exit panel 13 is ring-shaped and has a closed outer wall 19. The panel is funnel-shaped, such that the outer wall 19 has a smaller clear width at its end 20 located in the backrest 3 than at its end 21, which faces the front 12 of the backrest 3. At end 21, the panel also has an end edge 22 with a predetermined radius r. The panel is preferably made of plastic.

[0020] The base panel 14 is preferably formed from a foam component and is also integrated into or inserted into the seat cushion 7. Preferably, the base panel 14 is also arranged on the retaining element 15 for its alignment and / or fastening. The base panel 14 also has an end edge 23 facing the front 12 of the backrest 3, which has a radius R. The radius R of the base panel 14 is larger than the radius r of the belt exit panel 13. In particular, the radius R is at least 5 mm, while the radius r is at most 3 mm, preferably 2.5 mm or less.

[0021] The end edge 22 is set back from the end edge 23 within the substructure panel 14, so that the end edge 23 of the foam part protrudes from the belt exit panel 13 towards the front side 12.

[0022] The locking element 18 of the belt exit panel 13 is, in particular, formed integrally with it and is elastically displaceable. For this purpose, the locking element 18 has, for example, a locking arm 18' which is elastically deformable, and at the free end of which a locking lug 18'' is formed which, in the locked state, engages the locking element receptacle 17 of the retaining element 15 in a form-fitting manner, thereby positively locking the belt exit panel 13 to the locking element 18. Preferably, the belt exit panel 13 has several such locking elements 18 and the retaining element 15 has several locking element receptacles 17 to ensure secure attachment of the belt exit panel 13 to the retaining element 15.

[0023] The retaining element 15 and the base panel 14 together have a hardness exceeding 50 Shore A to withstand head impacts and meet the requirements for head impact safety. The foam portion of the base panel 14 serves primarily to conform to the contours and also allows for the head-impact-compliant integration of seam channels for seams or piping of the seat cover 5.

[0024] Fig. Figure 2A also shows the seat cover 5 and the safety belt 10. The seat cover 5 is clamped or held in place between the belt exit cover 13 and the base cover 14, so that the base cover 14 is enclosed by the seat cover 5 and thus concealed, while the belt exit cover 13 rests on the seat cover 5 and remains visible.The clamping force for tensioning the seat cover 15 between the base panel 14 and the belt exit panel 13 is preferably ensured by the locking device or by the locking element(s) 18 and the locking element receptacle(s) 17, so that by inserting the belt exit panel 13 into the base panel 14 not only is the belt exit panel 13 clipped or locked onto the retaining element 15, but also the seat cover 5 is tensioned or clamped between the base panel 14 and the belt exit panel 13 and optionally also the retaining element 15 for its attachment.

[0025] The backrest 3 also has a belt guide 24, which is attached to the support structure 6 of the backrest 3. The belt guide 24 is designed such that the safety belt 10, as shown in Fig.Figure 2A shows the belt guide 24, which is inserted into the belt exit plate 13 without the seat belt 10 coming into contact with the belt exit plate 13 at its end 20. This prevents the seat belt 10 from exerting an undesirable force on the belt exit plate 13, which could, for example, counteract the locking mechanism. The belt guide 24 is made of metal to absorb and transfer particularly high tension forces from the seat belt receptacle 11 and / or a belt tensioner into the supporting structure 6, so that even in the case of a belt tensioner, the seat belt 10 does not undesirably stress the belt exit plate 13. Furthermore, the belt guide 24 reduces wear that can occur between the belt exit plate 13 and the seat belt. A cover element 25 also conceals or closes the back of the seat back 3, which faces away from the front 12.

[0026] According to an alternative embodiment, the retaining element 15 and the base panel 14 are both made of the same material, in particular plastic, and are especially formed in one piece. This is particularly advantageous if no seam channel is required in the base panel 14 for the seat cover.

[0027] Furthermore, it is conceivable to use the solution presented here not only for routing a safety belt through the backrest, but also for other routings, such as those intended for accent applications or logo branches or the like. QUOTES INCLUDED IN THE DESCRIPTION

[0000] 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

[0000] DE 10 2020 203 795 A1

[0002]

Claims

[1] Vehicle seat (1), comprising a backrest (3) and a headrest (4) arranged on the backrest (3), wherein the backrest (3) has a support structure (6) on which a seat cushion (7) and a seat cover (5) are arranged, and comprising a channel (9) for the passage of a seat belt (10) for a user of the vehicle seat (1), wherein the channel (9) has a base panel (14) concealed by the seat cover (5) and a belt exit panel (13) held on the base panel, wherein the base panel (14) has an end edge (23) located below the seat cover (14), to which an end edge (2) of the belt exit panel (13) is set back, and wherein the end edge (23) of the base panel (14) has a radius (R) that is larger than the radius (r) of the end edge (22) of the belt exit panel (13), characterized by , that the channel (9) extends through the backrest (3). [2] Vehicle seat according to claim 1, characterized by, that the base panel (14) is attached to a retaining element (15) attached to the supporting structure (6) of the backrest (3), which together with the base panel (14) is surrounded by the seat cover (5). [3] Vehicle seat according to any one of the preceding claims, characterized by , that the belt exit cover (13) locks onto the retaining element (15). [4] Vehicle seat according to any one of the preceding claims, characterized by , that the belt exit panel (13) is held on the retaining element (15) by at least one elastically displaceable locking element (18). [5] Vehicle seat according to any one of the preceding claims, characterized by , that the retaining element (15) is ring-shaped and forms the channel (9). [6] Vehicle seat according to any one of the preceding claims, characterized by , that the under-cabinet panel (14) is made from a piece of foam. [7] Vehicle seat according to any one of the preceding claims, characterized by, that the retaining element (15) is made of plastic. [8] Vehicle seat according to any one of the preceding claims, characterized by , that the base panel (14) and the retaining element (15) are made of plastic and are in particular formed in one piece together. [9] Vehicle seat according to any one of the preceding claims, characterized by , that a belt guide (24) is attached to the supporting structure (6) and / or to the retaining element (15), which is arranged on the side of the belt exit panel (13) facing away from the end edge (22) of the belt exit panel (13). [10] Vehicle seat according to any one of the preceding claims, characterized by , that the belt guide (24) is made of metal.

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