DE102021126163A1 - Backrest module, backrest and vehicle seat - Google Patents

Abstract

The invention relates to a backrest module (7) for a backrest (3) of a vehicle seat (1), having at least: - a basic frame (10) made of plastic, the basic frame (10) being made in one piece, and component, whereby the basic structure (10) accommodates and supports the at least one functional component. According to the invention, it is provided that the basic structure (10) has a first assembly bracket (12a) which is connected to a main body (11) of the basic structure (10 ) is coupled in such a way that a gap is formed between the main body (11) and the first mounting bracket (12a) in such a way that the backrest module (7) is placed on a backrest frame (4) of the backrest (3). and the backrest frame (4) can be positioned in the gap (18) formed so that the basic structure (10) can rest against both a front and a rear of the backrest frame (4) for securely fixing the backrest -module (7) on the backrest frame (4).

Description

The invention relates to a backrest module for a backrest, a backrest for a vehicle seat and the vehicle seat.

When assembling seat backs for a vehicle seat, the seat back frame is typically provided, as well as front and rear seat back modules. These are placed individually on the backrest frame from the front or rear and connected to one another via appropriate connecting means, for example screws. Other functional components that are to be integrated into the backrest, such as massage bladders, loudspeaker modules, pneumatic cushions, spring mats, foam cushion modules, etc., are also connected directly to the backrest frame, e.g. using screws.

The individual components of the backrest are stored in a JIT (just-in-time) plant and, depending on the customer's requirements, attached to the backrest frame in the JIT plant and then delivered to the assembly plant where the vehicle seat is fully assembled. For this reason, a series of individual parts that are then used must be kept available or stored in the JIT factory.

In US20160229322A1 and US20170036579A1 further describes a method for assembling a vehicle seat, wherein a front seat back module or a back cushion module and a seat back frame or a seat back frame are provided. The front backrest module is coupled to a further rear backrest module or rear wall module around the backrest frame, so that the backrest frame is enclosed between the two, with the front backrest module in the area of a headrest receptacle can rest on the backrest frame. This achieves a connection between the backrest modules and the backrest frame, with the connection between the backrest modules being secured by additional fastening mechanisms.

In DE 10 2016 212 387 A1 describes a support layer of structural foam material onto which multiple functional components can be installed to form a subassembly. The support layer serves to give the backrest structural support. An upholstery layer is then positioned on the subassembly and both are mounted from the front on supports of a seat back frame and back frame, respectively. Thereafter, a cover material is folded over and attached to a back panel.

In US20180037143A1 A seat back and suspension module is also provided that includes an injection molded support substrate and a suspension system as an additional functional component. This, together with a seat back backplate module, sandwiches a seat back frame of the vehicle seat, with the two modules being interconnected via additional attachment mechanisms to secure attachment to the seat back frame.

In US20180056834A1 a backrest assembly is also described as the front backrest module, which in particular has a ventilation fan assembly or a bladder arrangement as additional functional components. The backrest assembly includes a backrest support formed from two walls coupled together by a connector. The seat back assembly is brought against the seat back frame from the front and is connected to a rear panel which is brought against the seat back frame from the rear via additional fastening mechanisms to achieve attachment to the seat back frame. Also in US20190143913A1 describes that two coupled modules enclose a frame.

A disadvantage of the backrests described is that the respective backrest modules are fastened to the backrest frame in that a backrest module resting on the backrest frame from the front is connected to a backrest module resting on the backrest frame from the rear via additional fastening mechanisms or Connecting means is coupled around the backrest frame. However, the assembly is very complex and uncomfortable. Furthermore, a number of additional connecting elements are to be provided in order to achieve such a fastening. In addition, such a module is only suitable for pre-assembly processes to a limited extent, since it only acquires its final form and function after it has been assembled in a complete seat assembly.

Proceeding from this, the object of the invention is to provide a backrest module, a backrest and a vehicle seat that are simple, comfortable and inexpensive to manufacture.

This object is solved by a backrest module, a backrest and a vehicle seat according to the independent claims. The Subclaims describe preferred developments.

Thus, according to the invention, it is provided that a basic structure of a backrest module preferably has a first mounting bracket on the upper side, which is coupled to a main body of the basic structure in such a way that a gap is formed between the main body and the first mounting bracket in such a way that the backrest module can be placed or slipped onto a backrest frame of the backrest and the backrest frame can be positioned in the gap formed so that the basic framework can rest against both a front and a back of the backrest frame for secure fixing the backrest module on the backrest frame. The intermediate space is a kind of cavity which is delimited upwards and laterally by the main body and the first mounting bracket, while the cavity is open downwards so that the backrest frame can protrude downwards from the intermediate frame formed.

The basic frame is made in one piece and is made of a rigid or rigid or structurally stable plastic, for example in an injection molding process, with this one-piece basic frame receiving and supporting the at least one functional component. Advantageously, the at least one functional component can thus be preassembled on the basic structure, so that the entire backrest module can also be tested for its functionality according to the customer's requirements before it is assembled on the backrest frame. Accordingly, the individual components of the backrest are not necessarily to be stored in a JIT plant (JIT, Just in Time) near the assembly plant of the vehicle seat and then assembled there.

Furthermore, the modularly available backrest module with the pre-assembled functional components can be attached to the backrest frame in a simple manner via the basic structure, with the first assembly strap being used in particular, which is an integral part of the basic structure. The backrest module is securely enclosed by the gap formed, so that no additional means to be connected to the backrest module are required to achieve final attachment. It is only necessary to ensure a secure coupling between the first assembly strap and the main body of the basic structure and thus a rigid or fixed formation of the intermediate space in which the backrest frame is accommodated in the assembled state.

For this purpose, it is preferably provided that the first mounting bracket is pivotably connected to the main body via a first film hinge, the first mounting bracket, the first film hinge and the main body being made in one piece, in particular being produced in an injection molding process. The first film hinge can be formed, for example, by forming a thinner material in a first transition area between the main body and the first mounting bracket using the injection molding process, so that an angularly movable and almost wear-free connection is formed between the main body and the first mounting -Tab itself, however, remain rigid or rigid or structurally stable. In this way, an attachment option that is designed in one piece with the basic structure is created in a simple manner, with the first assembly tab only being folded over during final assembly in order to form the intermediate space, which simplifies both assembly and production, for example in a correspondingly designed injection mold.

Preferably, it is further provided that the base frame has a second mounting bracket on the underside, which is pivotably connected, for example via a second film hinge, or fixed to the main body, with the second mounting bracket, possibly the second film hinge and the main body being made in one piece are, in particular are produced in an injection molding process. The second film hinge can be formed, for example, by forming a thinner material in a second transition area between the main body and the second mounting bracket using the injection molding process, so that an angularly movable and almost wear-free connection is formed between the main body and the second mounting -Tab itself, however, remain rigid or rigid or structurally stable. Comparable to the first mounting bracket, this creates a further fastening option which is designed in one piece with the basic structure, which has the same advantages and also enables the backrest module to be fastened on the underside via the basic structure which is manufactured in one piece. This can be done, for example, by clipping, ie either the second mounting bracket, which is firmly connected to the main body, is suitably clipped to, for example, a cross member of the backrest frame, or the second mounting bracket, which is pivotably connected to the main body, is first pivoted and then attached to the backrest Frame clipped. This allows a secure attachment of the modular constructed backrest module can be guaranteed with a simple production at the same time.

It is preferably also provided that the first mounting bracket is coupled to the main body via connecting means, in particular a clip connection, in order to form and fix the intermediate space. Accordingly, no complex connection to the backrest frame is necessary to form the intermediate space or to establish a secure connection with the backrest frame. This simplifies assembly (and disassembly). Such a connection can advantageously also be provided for the coupling between the second assembly bracket and the main body of the basic framework.

Preferably, it is further provided that the basic structure accommodates and supports at least one component as a functional component, which is selected from the group consisting of: a loudspeaker module, a massage module, a pneumatic cushion module, a lumbar support module, a spring mat, a backrest panel, a cushion layer. Depending on the customer's requirements, a large number of functionalities can be implemented on the vehicle seat in a modular manner, with the individual functional components being able to be tested after pre-assembly on the backrest module.

It is preferably also provided that the at least one functional component is fastened to the basic structure via connecting pieces and/or directly or indirectly to the basic structure via other functional components. Accordingly, an independent backrest module is formed whose functional components are not primarily dependent on attachment to the backrest frame. Therefore, the at least one functional component can be attached to the backrest module in a preassembled manner, so that the at least one functional component is attached to the backrest frame only indirectly via the basic framework.

The invention further relates to a backrest with a backrest frame and a backrest module, in particular the backrest module according to the invention, wherein the backrest module is fixed to the backrest frame such that the at least one functional component on the backrest module is held on the backrest frame, it being provided according to the invention that the basic structure has a first mounting bracket on the top side, which is coupled to a main body of the basic structure in such a way that an intermediate space is formed between the main body and the first mounting bracket,
wherein the backrest module is placed or slipped onto the backrest frame in such a way that the backrest frame is positioned in the gap formed and the base frame rests against both a front side and a rear side of the backrest frame in order to securely fasten the backrest -module on the backrest frame.

Provision is preferably made here for the backrest module to be connected to the backrest frame on the upper side only via the first assembly bracket of the basic framework. Alternatively, it can be provided that the backrest module is only connected to the backrest frame via the first mounting bracket on the top side and via a second mounting bracket, which is preferably arranged on the underside of the basic structure, on the underside. Therefore, a complex attachment of the backrest module and the associated functional components on the backrest frame can be avoided, since only the integrally connected to the backrest frame (s) mounting bracket (s) is used, which alone already have a enable position-retaining attachment of the backrest module in a simple and comfortable way.

Provision can preferably also be made for a rear cover to be provided on the back of the backrest frame to cover the back of the backrest frame. This is preferably attached to the backrest frame separately from the backrest module, so that the backrest module is completely independent of other components.

• 1 eine perspektivische Ansicht eines Fahrzeugsitzes;
• 2, 3 Ansichten eines Rückenlehnen-Moduls an einem Rückenlehnen-Rahmen des Fahrzeugsitzes gemäß 1;
• 4, 5, 5a ein Grundgerüst des Rückenlehnen-Moduls gemäß 2 in Detailansichten;
• 6 das Grundgerüst gemäß 5 an dem Rückenlehnen-Rahmen des Fahrzeugsitzes;
• 7 das Grundgerüst in einer Rückansicht; und
• 8, 9 das Rückenlehnen-Modul mit mehreren Funktions-Komponenten.

The invention is explained in more detail below with reference to the accompanying drawings of an embodiment. Show it:

• 1 a perspective view of a vehicle seat;
• 2 , 3 According to views of a backrest module on a backrest frame of the vehicle seat 1 ;
• 4 , 5 , 5a a framework of the backrest module according to 2 in detailed views;
• 6 the framework according to 5 on the back frame of the vehicle seat;
• 7 the basic structure in a rear view; and
• 8th , 9 the backrest module with several functional components.

In 1 is a vehicle seat 1 mounted on seat rails with a seat part 2 and a back Rest 3 shown, which are pivotally connected to each other, wherein the backrest 3 has a backrest frame 4 and the seat part 2 has a seat part frame 5. The respective frame 4, 5 is made of metallic components or sheets, in particular of cross members 19 and side panels 21, and is used to give the backrest 3 or the seat part 2 structural support. Side airbag modules 9 (see Fig. 3 ), a headrest (not shown), further functional components 6 (s. 2 , 8th , 9 ), which in the present invention in a backrest module 7 (s. 3 ) are integrated, and a rear cover 8 is attached directly or indirectly and then at least partially covered or encased by a cover.

As additional functional components 6 in the backrest module 7, for example, a loudspeaker module 6a, a massage module 6b, a pneumatic cushion module 6c, a lumbar support module 6d, a spring mat 6e, a backrest panel 6f, a cushion layer 6g , etc. can be provided. At least the backrest 3 is therefore of modular design, with individual functional components 6 also being omitted and others being added, for example a ventilation module (not shown) and/or a vibration module (not shown), depending on the customer's requirements. The assembly or assembly of such a modular backrest 3 with a backrest module 7 is achieved as follows:

First is a framework 10, which is in the 4 and 5 is shown individually, made of plastic or plastic, which is produced in one-piece form, for example in an injection molding process in a corresponding injection mold. In order to optimize the production process of the basic structure 10, no undercuts are provided on the basic structure 10, which makes it easier to remove the completed basic structure 10 from the injection mold. Such a provided basic frame 10 is used here as a "constructive interface" between the above functional components 6 and the metallic backrest frame 4, wherein the basic frame 10 with the respective functional components 6 arranged on it or connected thereto forms an independent, pre-assemblable backrest Module 7 trains. This can be easily and conveniently connected directly to the backrest frame 4 in the pre-assembled state.

To achieve this, the basic framework 10, which is manufactured in one piece, is as shown in FIGS 4 , 5 and 6 shown divided into a main body 11, a top-side first mounting bracket 12a and a bottom-side second mounting bracket 12b. A first film hinge 14a is formed in a first transition region 13a in the upper part of the basic structure 10, which forms the transition between the main body 11 and the first mounting bracket 12a on the upper side. Furthermore, a second film hinge 14b is formed in a second transition area 13b in the lower part of the basic structure 10, which forms the transition between the main body 11 and the second mounting bracket 12b on the underside. As in 5a indicated, the respective film hinge 14a, 14b extends continuously over the entire width of the respective transition area 13a, 13b. However, the respective film hinge 14a, 14b can also be formed by individual webs which are distributed evenly over the entire width of the respective transition region 13a, 13b, as in 5a indicated by dashed lines. In principle, provision can also be made for the second mounting bracket 12b on the underside to be firmly connected to the main body 11 .

In the context of the invention, a film hinge 14a, 14b is understood to mean an angularly movable and almost wear-free connection between the main body 11 and the first or second mounting bracket 12a, 12b, with the film hinge 14a, 14b being made in one piece with the main body 11 and the first and second mounting bracket 12a, 12b is formed. The respective film hinge 14a, 14b is preferably made thinner than the main body 11 and the first or second mounting bracket 12a, 12b in order to ensure a pivotable connection. This can be achieved by an appropriate selection of the injection mold, so that only one injection molding process in a single injection mold and no additional subsequent processing to form the respective film hinge 14a, 14b is necessary. As a result, a complete, one-piece basic structure 10 can be obtained in a simple manner.

The one-piece basic frame 10 also has connecting pieces 15 at defined positions in the area of the main body 11 , which are used to attach the functional components 6 directly or indirectly to the basic frame 10 . The spring mat 6e, as in particular in 1 shown hooked to side connectors 15a and the lumbar support module 6d attached to lower connectors 15b, the lumbar support module 6d also being supported backwards at the same time by the spring mat 6e. The massage module 6b can also be supported to the rear by the spring mat 6e and at the same time be held on the base frame 10 via the lateral connecting pieces 15a.

The loudspeaker modules 6a, the backrest paneling 6f and the pneumatic padding modules 6c are connected indirectly to the base frame 10 via the padding layer 6g, with the padding layer 6g in turn lying around the edge on the base frame 10 and clipped to the base frame 10 via corresponding receptacles, for example can be. On the upper side, the upholstery layer 6g and the backrest paneling 6f are placed around or over the basic framework 10 . The cushion layer 6g has securing hooks 16 on the underside in order to secure the cushion layer 6g together with the components fastened to it in the assembled state. A cutout 20 for a headrest (not shown) can also be arranged on the upper side of the basic structure 10, with the backrest covering 6f and the padding layer 6g also being cut out in alignment with this, as in particular in FIG 2 shown.

To attach such a backrest module 7 together with the functional components 6 attached to it to the backrest frame 4 via the basic structure 10, this is first placed on a front side 4a of the backrest frame 4, while the first mounting bracket 12a is folded up is, as in 6 shown, where in 6 for the sake of clarity, only the spring mat 6e is fastened to the basic framework 10 as a functional component 6 . The first assembly tab 12a is then folded back over the first film hinge 14a so that it rests against a rear side 4b of the backrest frame 4, as shown in FIG 1 shown. In this state, the main body 11 is coupled to the first mounting bracket 12a via connecting means 17, for example clip connections 17a, so that an intermediate space 18 is formed which is delimited at the top and side by the main body 11 and the first mounting bracket 12a. The backrest module 7 is accordingly slipped over the backrest frame 4 so that the backrest frame 4 is securely positioned in the intermediate space 18 formed between the main body 11 and the first mounting bracket 12a.

In a subsequent step, the second mounting bracket 12b is pivoted backwards on the underside so that it can be rotated around a cross member 19 (see Fig. 1 , 3 , 6 ) of the backrest frame 4, with the second mounting bracket 12b also being coupled to the main body 11 and/or to the cross member 19 of the backrest frame 4 via suitable connecting means 17, for example a clip connection 17a (see Fig. 7 ). In principle, provision can also be made for the second mounting bracket 12b on the underside to be firmly connected to the main body 11 (in one piece). This second mounting bracket 12b can then also be connected or clipped to the cross member 19 of the backrest frame 4 via a connecting means 17, in particular the clip connection 17a. A movement of the lower part of the framework 10 is prevented.

The base frame 10 and thus the entire backrest module 7 together with all functional components 6 arranged thereon can be fastened to the backrest frame 4 comfortably and securely via the two mounting brackets 12a, 12b. The application to the front side 4a, the folding over or fastening of the mounting tabs 12a, 12b and the connection to one another via the connecting means 17, e.g. clips, can be carried out easily and non-destructively and can therefore also be carried out by a robot with little effort, see above that the degree of automation increases.

Subsequently, the rear cover 8 can be placed against the seat back frame 4 from the rear side 4b and fastened thereto, and then a cover can be attached to complete the seat back 3.

reference list

1

vehicle seat

2

seat part

3

backrest

4

backrest frame

4a

Front of the backrest frame 4

4b

Rear of backrest frame 4

5

seat frame

6

function component

6a

speaker module

6b

Massage module 6b

6c

pneumatic upholstery module

6d

Lumbar Support Module

6e

feather mat

6f

Backrest panel

6g

cushion layer

7

backrest module

8th

back cover

9

airbag module

10

basic framework

11

main body

12a

first mounting tab

12b

second mounting tab

13a

first transition area

13b

second transition area

14a

first film hinge

14b

second film hinge

15

connector

15a

side connectors

15b

lower connectors

16

safety hook

17

lanyard

17a

clip connections

18

space

19

cross member

20

recess

21

sidewall

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• US20160229322A1 [0004]
• US20170036579A1[0004]
• DE 102016212387 A1 [0005]
• US20180037143A1 [0006]
• US20180056834A1 [0007]
• US20190143913A1 [0007]

Claims (12)

Backrest module (7) for a backrest (3) of a vehicle seat (1), having at least: - a basic frame (10) made of plastic, the basic frame (10) being made in one piece, and - at least one functional component (6) , wherein the basic structure (10) accommodates and supports the at least one functional component (6), characterized in that the basic structure (10) has a first assembly bracket (12a) which is connected to a main body (11) of the basic structure (10 ) is coupled in such a way that an intermediate space (18) is formed between the main body (11) and the first mounting bracket (12a) in such a way that the backrest module (7) rests on a backrest frame (4) of the backrest (3 ) are placed and the backrest frame (4) can be positioned in the intermediate space (18) formed, so that the basic framework (10) can be attached to both a front side (4a) and a rear side (4b) of the backrest frame ( 4) can rest against the backrest frame (4) to securely fix the backrest module (7). backrest module (7). claim 1 , characterized in that the first mounting bracket (12a) is pivotally connected to the main body (11) via a first film hinge (14a), the first mounting bracket (12a), the first film hinge (14a) and the main body ( 11) are made in one piece, in particular are produced in an injection molding process. backrest module (7). claim 1 or 2 , characterized in that the base frame (10) has a second mounting bracket (12b) on the underside, which is pivotably connected, for example via a second film hinge (14b), or fixed to the main body (11), the second mounting bracket (12b), optionally the second film hinge (14b) and the main body (11) are made in one piece, in particular are produced in an injection molding process. Backrest module (7) according to one of the preceding claims, characterized in that the first mounting bracket (12a) is coupled to the main body (11) via connecting means (17), in particular a clip connection (17a), in order to close the intermediate space ( 18) to train and establish. Backrest module (7) according to one of the preceding claims, characterized in that the basic framework (10) accommodates and supports at least one component as a functional component (6) which is selected from the group consisting of: a loudspeaker module (6a ), a massage module (6b), a pneumatic cushion module (6c), a lumbar support module (6d), a spring mat (6e), a backrest cover (6f), a cushion layer (6g). Backrest module (7) according to one of the preceding claims, characterized in that the at least one functional component (6) via connecting pieces (15) on the basic framework (10) and/or via other functional components (6) directly or indirectly is attached to the base frame (10). Backrest (3) for a vehicle seat (1), at least having: - a backrest frame (4) with crossbeams (19) and side panels (21), preferably made of a metallic material, and - a backrest module (7), in particular according to one of the preceding claims, with a basic framework (10) made of plastic and at least one functional component (6), wherein the basic framework (10) is designed in one piece and accommodates and supports the at least one functional component (6), and wherein the The backrest module (7) is fixed to the backrest frame (4) in such a way that the at least one functional component (6) is held on the backrest frame (4) via the backrest module (7), characterized in that the base frame (10) has a first mounting bracket (12a) which is coupled to a main body (11) of the base frame (10) in such a way that there is a gap ( 18) is formed, with the backrest module (7) being placed on the backrest frame (4) in such a way that the backrest frame (4) is positioned in the intermediate space (18) formed and the base frame (10) on both on a front side (4a) and on a rear side (4b) of the backrest frame (4) for securely fixing the backrest module (7) on the backrest frame (4). Backrest (3) after claim 7 , characterized in that the backrest module (7) is connected to the backrest frame (4) only via the first mounting bracket (12a) of the basic framework (10). Backrest (3) after claim 7 , characterized in that the backrest module (7) to the backrest frame ( 4) is connected. Backrest (3) according to one of Claims 7 until 9 , characterized in that on the back (4b) of the backrest frame (4) a rear cover (8) is provided for covering the backrest frame (4). Backrest (3) according to one of Claims 7 until 10 , characterized in that the at least one functional component (6) is attached to the backrest module (7) so that it can be preassembled, with the at least one functional component (6) preferably being attached to the base frame (10) and /or is attached directly or indirectly to the base frame (10) via other functional components (6), so that the at least one functional component (6) is attached to the backrest frame (4) only indirectly via the base structure (10). is. Vehicle seat (1) with a backrest (3) according to one of Claims 7 until 11 and a seat portion (2) pivotally connected thereto.

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