Backrest assembly of a belt-integrated seat with an integrated belt retractor module

Abstract

The invention relates to a backrest assembly of an integral belt seat, comprising a first assembly having backrest side members (10, 20), between which at least one backrest head plate is arranged in a fixed position. It is provided that the backrest assembly comprises a second assembly designed as a prefabricated belt retractor module, wherein the belt retractor module has a rear backrest head plate (71) and at least one receptacle. In an assembled state of the backrest assembly, the belt retractor module has, on its inner surface facing a front backrest head plate (40) of the first assembly, at least one receptacle in which a belt retractor is reversibly arranged. In the assembled state, the belt retractor module is arranged integrated in a space formed in the first assembly, which space is delimited by the backrest side members (10, 20) and the front backrest head plate (40).

Description

[0001] The invention relates to a backrest assembly of a belt-integrated seat, comprising a first assembly having backrest side members between which at least one backrest head plate is arranged in a fixed position.

[0002] The document DE 11 2018 006 209 B4 describes a vehicle seat, in particular a motor vehicle seat, comprising a seat part arranged on a seat base, a backrest arranged on the seat part or on the seat base so as to be pivotable about a backrest pivot axis by means of a backrest fitting, wherein the vehicle seat has a three-point safety belt, wherein the safety belt is guided through a belt outlet arranged in the upper lateral region of the backrest. It is disclosed that a vehicle seat according to a first exemplary embodiment is equipped with an automatic belt retractor in the region of the backrest and an additional load belt. The automatic belt retractor preferably has a belt tensioner. The automatic belt retractor associated with the safety belt securing the user is held in the upper backrest region.

[0003] The document DE 10 2020 110 594 A1 describes a seat assembly with integrated belt restraint. A seatback assembly includes a seatback frame having first and second side members defining a backrest support portion of the seatback frame. An upper frame member connects the first and second side members of the seatback frame to define a headrest support portion of the seatback frame. An upper mounting plate is coupled to the upper frame member. A support rod is coupled to the upper mounting plate. A retractor mechanism is operatively coupled to the backrest support portion of the seatback frame. A mounting bracket is operatively coupled to the seatback frame. A safety belt includes a webbing having a first portion operatively coupled to the retractor mechanism and extending therefrom within an interior space of the seatback assembly toward the support rod.A second section of webbing extends within the interior of the seatback assembly from the support rod to the mounting bracket.

[0004] The vehicle seats described in the publications are integral belt seats that combine all the desired seat functions, including the function of a safety belt. Integral belt seats can be removed and inserted as a whole from a vehicle. With integral belt seats, a backrest of the integral belt seat is attached to the seat part or the seat base. The integral belt seat comprises a safety belt device with an automatic belt retractor, also known as a belt retractor. Two different designs are known from the prior art. The automatic belt retractor is either located in the backrest and is primarily assigned to the shoulder belt, or the automatic belt retractor is assigned to the seat base, in particular in a rear side part of the seat base, or to a seat part that is supported by the seat base.

[0005] The present invention relates to a belt-integrated seat comprising a seat part and a backrest, which is equipped with a safety belt in three-point construction, wherein the safety belt is arranged in a belt outlet arranged in the upper lateral area of the backrest (compare in advance the Fig. 1E and Fig. 3) by means of a belt deflection element 30 (compare Fig. 1D and Fig. 2D). A seat belt webbing is, for example, in a belt retractor 3 (compare in advance the Fig. 1E and Fig. 2E) which is arranged in the backrest. The safety belt is fixed (not partially shown) by means of a belt end fitting to a structure on the seat part side or seat base side or also to a structure on the backrest side of the belt integral seat near the transition from the lower end of the backrest to the rear end of the seat part. The safety belt can also be fixed by means of a belt buckle to a belt buckle attachment point which is arranged on the side of the belt integral seat opposite the belt end fitting, also near the transition from the lower end of the backrest to the rear end of the seat part. The safety belt is divided into two sections, essentially as a lap belt between the belt end fitting and the closed belt buckle and as a shoulder belt between the closed belt buckle and the belt outlet.

[0006] The safety belt thus runs in the first section, referred to as the shoulder belt, from the belt retractor 3 via the belt outlet to a belt buckle. After being deflected at the belt buckle, the safety belt continues over the second section, referred to as the lap belt, to the belt end fitting. In order for the shoulder belt to be able to exit from the belt retractor 3 via the belt outlet in the upper lateral area of the backrest, the technical requirement is to integrate the belt retractor into the limited installation space available in the backrest in such a way that not only the belt retractor 3 itself finds space, but also the structure of the backrest with the integrated belt retractor 3 has a stability that can absorb the belt forces, particularly in the event of a crash (load case). The belt retractor 3 is assigned a belt tensioner unit 2 and a drive unit 1.In the present embodiment, the units are arranged next to each other in a kind of longitudinal construction, as in . Fig. 2E. The aforementioned belt retractor units together form a so-called belt retractor.

[0007] The structure of the belt retractor is not the subject of the invention, but, as explained, the technical requirement is to integrate the belt retractor unit into the small installation space available in the backrest in such a way that the belt retractor itself finds space and, in addition, the structure of the backrest with the integrated belt retractor has a stability so that the belt forces acting on the belt retractor or the belt retractor units can be absorbed.

[0008] The invention is therefore based on the object of designing a belt integral seat with a backrest in which a belt retractor is integrated, which is arranged in a space-saving manner and is easy to install, wherein after installation an optimal strength connection is to be formed between the structure of the backrest and the belt retractor so that the belt forces acting on the structure of the backrest in the event of a crash can be absorbed by the structure of the backrest.

[0009] The starting point of the invention is a backrest assembly of a belt-integrated seat, comprising a first assembly which has backrest side members between which at least one backrest head plate is arranged in a fixed position.

[0010] According to the invention, the backrest assembly comprises a second assembly which is designed as a prefabricated belt retractor module, wherein the belt retractor module has a rear backrest head plate and at least one receptacle, wherein the belt retractor module has, on its inner surface directed towards a front backrest head plate of the first assembly in an assembled state of the backrest assembly, at least one receptacle in which a belt retractor is reversibly arranged, wherein the belt retractor module, in the assembled state, is arranged integrated in an installation space formed in the first assembly, which space is delimited by the backrest side members and the front backrest head plate.

[0011] To create a structural connection between the first assembly and the second assembly, it is preferably provided that the second assembly, i.e. the belt retractor module, is arranged in the installation space of the first assembly in the assembled state, and the first and second assemblies are securely connected to one another via at least one detachable connecting group. Advantageously, the prefabricated belt retractor module can be easily assembled and positioned in the installation space, with the structure of the backrest head being designed to be stabilized in such a way that forces acting on the belt retractor module and, in the force flow, on the structure of the backrest can be absorbed while taking personal safety into account, as explained in the description.

[0012] It is preferably provided that the front backrest head plate has a three-dimensional U-shaped configuration to form the installation space, wherein a substantially flat surface of the front backrest head plate is orthogonally delimited by elements arranged on the top and bottom sides, which are arranged at each end of the backrest head plate in the assembled state. It is provided that the front backrest head plate forms a bead in an upper end region of the U-shaped configuration of an angled edge and in a lower end region of the U-shaped configuration, which forms an upper side, the horizontal surface of which in the installed state runs parallel to a surface of an underside of the angled upper edge, which surface is horizontal in the installed state, wherein the front backrest head plate formed above the bead, is substantially flat and arranged vertically in the installed state and forms a vertical surface between the underside of the edge and the upper side of the bead.

[0013] Furthermore, it is preferably provided that the front backrest head plate has a three-dimensional U-shaped configuration to form the installation space, which is characterized in that the essentially flat surface of the front backrest head plate is orthogonally delimited by elements arranged laterally at each end of the backrest head plate in the assembled state. The laterally arranged elements are preferably angled side plates whose three-dimensional contours correspond to the contours of the backrest side members facing the side plates in such a way that the side plates fit snugly against the insides of the backrest side members in the assembled state.

[0014] Preferably, it is further provided that the at least one receptacle and / or the rear backrest head plate of the second assembly is detachably connected to the backrest side members and / or the front backrest head plate by means of at least one connecting assembly. In other words, any desired replacement of the second assembly as a whole is advantageously possible.

[0015] In detail, it is preferably provided that receiving and stabilizing plates and a receiving and stabilizing cage are arranged on the inner surface of the rear backrest head plate to stabilize the backrest head plate and to accommodate multiple belt retractor units of the belt retractor. The arrangement of the at least one receptacle or receptacles advantageously achieves synergistic effects with regard to the stability of the rear backrest head plate, i.e., the second assembly as a whole, and the possibility of arranging the belt retractor in the second assembly designed as a belt retractor module.

[0016] On the assembly side, the invention provides that the second assembly, designed as a prefabricated belt retractor module, is advantageously reversibly inserted by the worker during assembly from a rear side of the backrest into the installation space of the first assembly.

[0017] The invention relates to a belt-integrated seat having a backrest characterized by the backrest assembly explained above.

[0018] The preceding statements and the following description of the invention are based on directional terms such as "upper," "lower," "rear," "front," "vertical," "horizontal," and derivatives thereof to define the position of components of the backrest assembly. This assumes the usual installation position of a backrest of an integral seat belt installed in the interior of a vehicle.

[0019] The invention is explained below with reference to the accompanying drawings. They show: Fig. 1A to 1E show a backrest assembly with its components and a belt retractor module in perspective views obliquely from the rear; Fig. 2A to 2E show the backrest assembly with its components and the belt retractor module in essentially side views; Fig. 3 the belt retractor module according to Fig. 1E, Fig. 2E in an enlarged perspective view obliquely from the front.

[0020] The Fig. 1A to 1E and 2A to 2E show, in a synopsis, a backrest assembly of a backrest head which comprises vertical backrest side members 10, 20 with reference to the usual installation position of a backrest arranged essentially vertically in an interior of a vehicle.

[0021] The present exemplary embodiment involves upper backrest side members 10, 20 of a backrest, which are arranged on lower backrest side members (not shown) for adjusting the inclination of the backrest head relative to the lower backrest structure. However, the inventive solution explained below can generally be applied to backrest side members with or without upper backrest head adjustment, as explicitly stated, which is why the following discussion refers exclusively to backrest side members 10, 20 per se and not to "upper" backrest side members 10, 20.

[0022] The backrest assembly according to the invention comprises the backrest side members 10, 20 and a front backrest head plate 40, which are firmly connected to one another, particularly preferably welded to one another.

[0023] The front backrest head plate 40 is designed such that it is arranged in a front region of the structure of the backrest.

[0024] The front backrest head plate 40 has a three-dimensional shape and in particular conforms to the three-dimensional shape of the inner sides of the backrest side members 10, 20.

[0025] The three-dimensional contouring of the backrest side members 10, 20 and the front backrest head plate 40, which reproduces the contours of the backrest side members 10, 20 in a kind of negative contour, ensures the formation of a particularly stable backrest head that can absorb high forces. When assembled, the surfaces of the front backrest head plate 40 facing the backrest side members 10, 20 form large contact surfaces with the surfaces facing the front backrest head plate 40 in the backrest side member areas, thus stabilizing the backrest head.

[0026] The Fig. 1C and Fig. 2C show an adapter plate 50 which is placed on an angled upper edge 43 of the front backrest head plate 40 and is fixedly connected, in particular screwed, to the backrest head plate 40 in the assembled state.

[0027] The adapter plate 50 forms receptacles for a headrest structural part 60, which is preferably also designed as a headrest plate and forms a basic structure of a headrest, which is arranged on the backrest by means of the adapter plate 50.

[0028] The Fig. 1D and Fig. 2D show, as already mentioned, the belt deflection element 30, which in the assembled state is arranged in a recessed provision 44 of the upper angled edge 43 of the backrest head plate 40. The front backrest head plate 40 is beaded in the area of the installation location of the belt deflection element 30, as best seen in Fig. 1B. This bead-like recessed recess 45 also serves to increase the stability of the front backrest head plate 40 in a load case.

[0029] The representations in the Fig. 1B, Fig. 2B make it clear that the front backrest head plate 40 further has a special three-dimensional shape, which is characterized by the formation of an otherwise substantially flat front plate which merges into the angled side plates, the three-dimensional contours of which correspond to the contours of the backrest side members 10, 20 pointing towards the side plates.

[0030] The representations in the Fig. 1B, Fig. 2B further show that the front backrest head plate 40 further has a special three-dimensional shape, which is characterized in that the front backrest head plate 40 has a U-shaped shape.

[0031] The angled upper edge 43 is formed in the upper end region of the U-shaped configuration.

[0032] Preferably, in the lower end region of the U-shaped configuration, a bead 41 is formed which forms an upper side whose horizontal surface in the installed state runs parallel to the horizontal surface of the underside of the angled upper edge 43 in the installed state.

[0033] In other words, the front backrest head plate 40, which is formed above the bead 41 and is arranged vertically in the installed state, wherein the vertical surface completes the U-shaped configuration of the backrest head plate 40, merges into a horizontal region in the region of the bead 41.

[0034] The bead 41 is further designed such that, in the installed state, a surface is formed below the horizontal region of the bead 41, which surface serves as a connecting and contact surface 46 for a rear backrest head plate 71, which is part of a belt retractor module, as will be explained below.

[0035] From this connecting and contact surface 46, in turn, an angled L-shaped edge 42 extends, which, in addition to the bead 41, also serves to stabilize the front backrest head plate 40 and, in the assembled state, serves as a support for the rear backrest head plate 71, as will be explained later.

[0036] The explanations and representations in the figures make it clear that the front backrest head plate 40 between the backrest side members 10, 20 forms a stable installation space for the belt retractor units 1, 2, 3 of the belt retractor, which installation space is delimited in both spatial directions y (horizontal) and z (vertical), and which, viewed in the third spatial direction x (horizontal), has a depth that essentially corresponds to the width of the backrest side members 10, 20.

[0037] The representations in the Fig. 1B, Fig. 2B also make it clear that an end face of the angled upper edge 43 of the front backrest head plate 40, which faces rearward toward the rear backrest head plate 71 and onto which the adapter plate 50 is placed, is substantially flush with an end face of the angled L-shaped edge 42, which faces rearward toward the rear backrest head plate 71.

[0038] In the above-defined installation space, the Fig. 1E and Fig. The belt retractor module shown in Figure 2E can be advantageously arranged, in particular inserted.

[0039] As mentioned, the design of the front backrest head plate 40 and its connection to the backrest side members 10, 20 already ensures an optimal strength connection of the first backrest assembly within the backrest head of the backrest assembly.

[0040] In an advantageous manner, the insertion of the belt retractor module additionally creates an even further improved optimal strength bond of the backrest head of the backrest assembly, as explained below.

[0041] The belt retractor module advantageously comprises the rear backrest head plate 71, on which the belt retractor units 1, 2, 3 are arranged on the inside facing the front backrest head plate 40.

[0042] In order to securely fasten the belt retractor units 1, 2, 3 to the rear backrest head plate 71, two receiving and stabilizing plates 75 and a receiving and stabilizing cage 76 are arranged on the inside of the rear backrest head plate 71 formed in the assembled state.

[0043] The rear backrest head plate 71 further comprises an upper angled horizontal ridge 72 extending from the vertically extending substantially flat surface of the plate of the rear backrest head plate 71.

[0044] The rear backrest head plate 71 further comprises lateral - vertically extending - angled ridges 73 extending from the vertically extending substantially flat surface of the plate of the rear backrest head plate 71.

[0045] The rear backrest head plate 71 further comprises a bevel 77 extending from the vertically extending, substantially flat surface of the sheet metal of the rear backrest head plate 71, which forms a lower sheet metal wall closing off the belt retractor module at the bottom.

[0046] From the bevel 77, in turn, a downwardly angled vertical groove 74 extends, which in the assembled state forms a connecting and contact surface 78 directed towards the front backrest head plate 40, which in the assembled state bears against the aforementioned vertically arranged connecting and contact surface 46 of the front backrest head plate 40.

[0047] The angled vertical ridge 74 forms a lower end face which, in the assembled state, rests on the upper side of the angled L-shaped edge 42 of the front backrest head plate 40, since the L-shaped edge 42 forms the support surface for the lower ridge 74 of the rear backrest head plate 71.

[0048] The belt retractor module is preferably positioned according to arrow P1 between the Fig. 2B and Fig. 2E is inserted into the designated installation space and screwed in.

[0049] In this case, an upper side of the angled L-shaped edge 42 of the front backrest head plate 40 forms a support surface for the downwardly directed end face of the lower ridge 74 of the rear backrest head plate 71 as soon as the belt retractor module is pushed into the installation space of the backrest head and the backrest assembly is now completed.

[0050] The belt retractor module, which essentially comprises the rear backrest head plate 71 and the receiving and stabilizing plates 75 and the receiving and stabilizing cage 76 for receiving the belt retractor units 1, 2, 3, is finally firmly connected, in particular screwed, to the front backrest head plate 40 and / or the backrest side members 10, 20, whereby the following essential connection groups are defined, which ensure that the backrest assembly is designed to absorb very high forces in the load case, whereby all components of the backrest assembly are arranged in a positionally stable manner in the load case

[0051] The belt retractor module is connected to the backrest side members 10, 20 and the front backrest head plate 40 by a first connection group, wherein in the exemplary embodiment, two screw connections S1 are preferably produced, which firmly connect the lateral slots 73 of the rear backrest head plate 71 to the backrest side members 10, 20 and the front backrest head plate 40 inserted in the backrest side members 10, 20.

[0052] The belt retractor module is connected to the front backrest head plate 40 by a second connection group, wherein in the exemplary embodiment, four screw connections S2 are preferably produced, which connect the lower groove 74 of the rear backrest head plate 71 to the bead 41. In the assembled state, the connecting and contact surfaces 46 and 78 initially lie against one another, while the lower end face of the angled vertical groove 74 is supported on the angled L-shaped edge 42. This flat contact with the bead 41 across the width of the entire backrest head advantageously also forms the very stable strength connection of the backrest assembly in the assembled state.

[0053] The belt retractor module is connected to the front backrest head plate 40 by a third connection group, wherein in the exemplary embodiment, four screw connections S3 are preferably produced, which include the receiving and stabilizing plates 75 and the receiving and stabilizing cage 76. The screw connections S3 extend through at least the receiving and stabilizing plates 75 and the receiving and stabilizing cage 76 and the front backrest head plate 40. This advantageously ensures that the receiving and stabilizing plates 75 and the receiving and stabilizing cage 76 are each positioned individually and within the belt retractor module on the front backrest head plate 40. The receiving and stabilizing plates 75 and the receiving and stabilizing cage 76 are preferably arranged, in particular welded, on the inside of the rear backrest head plate 71.Individually, they act as stabilizing elements of the belt retractor module. When assembled, they advantageously function as bulkhead plates, which accommodate the belt retractor units 1, 2, and 3 and stabilize them. Through their connection to the front backrest head plate 40, they ultimately act together with the front backrest head plate 40 and the backrest side members 10, 20 as a rigid connection for the backrest assembly.

[0054] Finally, the belt retractor module is connected to the front backrest head plate 40 by a fourth connection group, wherein in the exemplary embodiment, three screw connections S4 are preferably produced, which connect the upper rim 72 of the rear backrest head plate 71 to the edge 43 of the front backrest head plate 40, so that a stable positioning of the belt retractor module within the backrest assembly in the upper region of the backrest head is also effected. List of reference symbols 10, 20 backrest side rails 30 Belt deflection element 40 front backrest head plate 41 bead 42 board 43 Board 44 Providence 45 Detachment 46 Connection and contact surface 50 adapter plate 60 Headrest structural part 70 Belt retractor module 71 rear backrest head plate 72 Upper Palatinate 73 lateral palaces 74 Lower Palatinate 75 mounting and stabilizing plates 76 Recording and stabilization cage 77 chamfer 78 Connection and contact surface S1 screw connections S2 screw connections S3 screw connections S4 screw connections 1 drive unit 2 belt tensioner unit 3 Belt retractor unit P1 arrow (insertion direction) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 11 2018 006 209 B4

[0002] DE 10 2020 110 594 A1

[0003]

Claims

[1] Backrest assembly of a belt-integrated seat, comprising a first assembly having backrest side members (10, 20) between which at least one backrest head plate is arranged in a fixed position, characterized by in that the backrest assembly comprises a second assembly which is designed as a prefabricated belt retractor module, wherein the belt retractor module has a rear backrest head plate (71) and at least one receptacle, wherein the belt retractor module has, on its inner surface directed towards a front backrest head plate (40) of the first assembly in an assembled state of the backrest assembly, at least one receptacle in which a belt retractor is reversibly arranged, wherein the belt retractor module, in the assembled state, is arranged integrated in a construction space formed in the first assembly, which space is delimited by the backrest side members (10, 20) and the front backrest head plate (40). [2] Backrest assembly according to claim 1, characterized by in that the front backrest head plate (40) has a three-dimensional U-shaped configuration to form the installation space, wherein a substantially flat surface of the front backrest head plate (40) is orthogonally delimited by elements arranged on the top and bottom sides of the backrest head plate (40) in the assembled state. [3] Backrest assembly according to at least one of the preceding claims, characterized byin that the front backrest head plate (40) forms a bead (41) in an upper end region of the U-shaped configuration of an angled edge (43) and in a lower end region of the U-shaped configuration, said bead forming an upper side whose surface, which is horizontal in the installed state, runs parallel to a surface, which is horizontal in the installed state, of an underside of the angled upper edge (43), wherein the front backrest head plate (40) formed above the bead (41), is essentially flat and arranged vertically in the installed state and forms a vertical surface between the underside of the edge (43) and the upper side of the bead (41). [4] Backrest assembly according to at least one of the preceding claims, characterized byin that the front backrest head plate (40) has a three-dimensional U-shaped configuration to form the installation space, wherein the substantially flat surface of the front backrest head plate (40) is orthogonally delimited by elements arranged laterally at each end of the backrest head plate (40) in the assembled state. [5] Backrest assembly according to at least one of the preceding claims, characterized by that the laterally arranged elements are angled side panels whose three-dimensional contours correspond to the contours of the backrest side members (10, 20) pointing towards the side panels in such a way that the side panels fit snugly against the insides of the backrest side members (10, 20) in the assembled state. [6] Backrest assembly according to at least one of the preceding claims, characterized bythat the at least one receptacle and / or the rear backrest head plate (71) of the second assembly is detachably connected to the backrest side members (10, 20) and / or the front backrest head plate (40) by means of at least one connecting group. [7] Backrest assembly according to at least one of the preceding claims, characterized by that receiving and stabilizing plates (75) and a receiving and stabilizing cage (76) are arranged on the inner surface of the rear backrest head plate (71) for stabilizing the rear backrest head plate (71) and for receiving a plurality of belt retractor units (1, 2, 3) of the belt retractor. [8] Backrest assembly according to at least one of the preceding claims, characterized by that the second assembly, designed as a prefabricated belt retractor module, can be reversibly inserted from a rear side of the backrest into the installation space of the first assembly. [9] Belt-integrated seat, characterized bya backrest assembly according to at least one of claims 1 to 8.

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