WO2015086765A1

WO2015086765A1 - Seat part and vehicle seat

Info

Publication number: WO2015086765A1
Application number: PCT/EP2014/077428
Authority: WO
Inventors: Ingo Kienke; Gerhard ROHTSTEIN; Jörg Linnenbrink
Original assignee: Johnson Controls Gmbh
Priority date: 2013-12-13
Filing date: 2014-12-11
Publication date: 2015-06-18
Also published as: DE102013225963A1; DE102013225963B4

Abstract

The invention relates to a seat part, in particular a backrest for a vehicle seat. According to the invention, the seat part has a shell element, a padding element and a contour element which is arranged between the shell element and the padding element, spring elements being arranged between the shell element and the contour element.

Description

DESCRIPTION

Title seat part and vehicle seat

State of the art

The present invention is based on a seat part for a vehicle seat. Such seat parts, which function, for example, as a seat surface oriented almost horizontally or as a vertically aligned backrest, are well known in the prior art.

Such seat parts usually have a support structure with two lateral support profiles, between which run elastic clips, which are mounted in each case in recordings on the support profiles. The clips then act as suspension for resting on the elastic clips upholstery. A disadvantage of this structure is that due to the use of the clips neither a more complex contouring of the backrest, nor a uniform pressure distribution in the backrest is possible.

Furthermore, backrests are known from the prior art, which are designed as composite parts and are constructed from a plurality of cohesively interconnected foam and plastic layers. A disadvantage of such a backrest is that the production is comparatively complicated. Furthermore, such backrests are relatively heavy and require comparatively much space.

Disclosure of the invention

It is an object of the present invention to provide a seat part which is comparatively lightweight, space-compact and inexpensive to produce and which at the same time allows a more complex contouring and a uniform pressure distribution.

This object is achieved with a seat part, in particular a backrest, for a vehicle seat, wherein the seat part has a shell element, a cushioning element and an intermediate part. see the shell element and the padding element arranged contour element, wherein between the shell element and the contour element spring elements are arranged. The seat part according to the invention has over the prior art has the advantage that the user of the seat part facing contour of the seat part is determined by the shape of the contour element, so that any contour can be realized by appropriate shaping of the contour element in a simple manner. In particular, an ergonomically particularly advantageous contour for the user can be ensured in this way. At the same time a uniform or individually adjustable pressure distribution is achieved with each contour, since the entire contour element is mounted resiliently on the shell element via the spring elements. The pressure distribution is thus distributed homogeneously over the entire contour element, whereby the seating comfort for the user is significantly increased. Finally, the seat part according to the invention can be produced relatively easily, quickly and thus cost-effectively. The seat part in particular comprises a backrest of the vehicle seat. Alternatively, the seat part but also include the seat of the vehicle seat. Another advantage is that the pressure distribution is predetermined by the contour element and thus is independent of the formation of the cushion element. This opens up much more room for design with regard to the design of the vehicle seat.

Advantageous embodiments and modifications of the invention are the dependent claims and the description with reference to the drawings.

According to a preferred embodiment of the present invention it is provided that the shell element is designed as a rigid or at least semi-rigid support member. Advantageously, the shell element acts as a load-bearing support member for the vehicle seat, so that no additional structural elements are necessary. The shell element is preferably made of plastic, preferably of a glass and / or carbon fiber reinforced composite material (for example RTM = Resin Tranfer Moling). Alternatively, however, an injection-molded plastic would be possible. It is conceivable that the shell element simultaneously forms a rear wall of the seat part, so that advantageously no additional rear panel of the seat part is necessary. Alternatively, it would also be conceivable for the carrier element to be designed as a metallic frame construction, for example with two vertical side carriers and two horizontal carriers. According to a further preferred embodiment of the present invention, it is provided that the shell element has a receptacle for a side airbag and / or a fastening for receiving a retaining clip of a headrest. Advantageously, the side airbag is thus not put on, but integrated into the intermediate space between the shell element and the contour element or sunk into this intermediate space.

According to a further preferred embodiment of the present invention, it is provided that the shell element has a seat cover attachment channel, which is in particular integrally formed in side cheek edges of the shell element. Advantageously, a fabric can thus be attached directly to the rear wall, so that a simple assembly and a shapely conclusion is achieved.

According to a further preferred embodiment of the present invention, it is provided that the contour element is contoured to provide a seating contour facing a seat occupant and rigid or at least semi-rigid. Advantageously, the contour element thus retains its contour, so that an arbitrary seat contour can be provided for the user by means of a corresponding formation or contouring of the contour element. The basic contour of the contour element indicates the later finished contour. Preferably, the elasticity is adjustable with openings, which provide for soft areas, integrated spring elements, which provide for medium-hard areas, and closed areas, which provide for hard areas. By an appropriate combination of these three different areas, any pressure distribution pattern can be generated. Advantageously, thus a decoupling between the desired seating comfort and the design of the vehicle seat can be achieved.

According to a further preferred embodiment of the present invention, it is provided that the contour element has a plurality of slots and / or holes and / or a plurality of stiffening beads. Advantageously, a weight saving and a pleasant ventilation of the seat part are achieved through the slots and holes. The introduction of stiffening beads is used for selective stiffening of the contour element, for example, in the transition from a back region to adjacent side cheek areas. Namely, the contour element preferably has at least one back region and two side cheek regions which are inclined with respect to the back region. In this way, an ergonomically comfortable fixation of the user in the seat part can be achieved, which increases the seat comfort especially when cornering. According to a further preferred embodiment of the present invention, it is provided that the contour element has elastic regions and in particular at least two regions with different stiffnesses. Advantageously, the elasticity of the useful surface facing the user can thus be selectively changed in order to further increase the seating comfort. It is conceivable, for example, that in the lower part of a backrest, the contour element is formed elastically conforming. The contour element is preferably made of plastic and particularly preferably injection-molded. Most preferably, the contour element made of glass fiber reinforced injection molded, especially long glass fiber reinforced injection molding. It is also conceivable that the contour element formed and cut mats of fiber composite material, for example, organo sheet comprises.

In particular, it is provided that recesses, for example in the form of slits and / or through holes, and stiffening beads for forming different stiffnesses are arranged in a targeted manner along the contour element. In this case, the recesses and stiffening beads are preferably combined or arranged relative to one another such that specifically different stiffnesses are formed along the contour element. The combination of recesses and stiffening beads advantageously makes it possible to increase the range of possible stiffness without endangering the stability of the contour element or significantly increasing the weight. Furthermore, it is conceivable that the contour element has a region with recesses and a region with stiffening beads. For example, the area with the stiffening beads between two areas with recesses, in particular approximately halfway up the seat part, arranged. Furthermore, it is provided that the stiffening beads are formed as a region of increased material strength. In this case, the stiffening bead preferably extends along a preferred direction, in particular along a horizontally extending preferred direction. It is also conceivable that the stiffening bead is designed in one piece and extends from a side cheek to one of the side wall opposite another side cheek. In addition, it is conceivable that at least three recesses and / or two stiffening beads differ in their shape, their size and / or their orientation from each other.

According to a further preferred embodiment of the present invention, it is provided that the spring elements comprise bending springs and in particular U-springs and / or wherein the spring elements are made of metal. Advantageously, the contour element is thus resiliently mounted relative to the shell element. An education of complex composite components or the like to provide a uniform Suspension is therefore not necessary. The spring properties can be adjusted or selected in a simple manner by an appropriate selection of spring elements. Advantageously, additional space is available in the interior of the U-springs, in which at least partially in particular the side airbag is arranged. It is also conceivable that in this space additional units for additional functions, such as an adjustable lordosis function, are integrated. The spring elements can also have any other shape. Optionally, the spring elements on an integrated damper element, which is provided for adjusting the compression during insertion. According to a further preferred embodiment of the present invention it is provided that the padding element comprises a foam part or a spacer fabric. In this way, a pleasant ventilation and a good padding for the seat occupant is achieved. However, it is also conceivable that the padding element comprises an air-permeable spacer knitted fabric, which may be thinner than a foam layer and in which the upper material, such as the fabric, is directly integrated. The spacer fabric (also referred to as 3D fabric) then acts as a cushion pad on the bottom suspension. Alternatively, the padding element comprises a thin foam layer, preferably with layer thicknesses between 10 and 30 millimeters. To improve the ventilation, the foam layer is preferably provided with holes.

According to a further embodiment of the present invention, it is provided that a weight of the spacer fabric or a weight of the cushioning element is greater than a weight of the contoured element. In particular, it is conceivable that the thickness of the contour element is reduced in comparison to a stiffening bead-free and recess-free contour element by means of a specifically set combination of stiffening beads and recesses compared with a stiffening bead-free and recess-free contour element with the same stability, ie. H. Loading capacity. As a result, can be reduced in an advantageous manner by reducing the thickness of the contour element, the total weight of the seat part and save material. Furthermore, it is provided that a weight increase caused by the stiffening beads of the contour element is over-compensated by a weight loss caused by the contour of the contour element.

According to a further preferred embodiment of the present invention, it is provided that the padding element is covered on a user-facing side with a covering material, wherein the covering material, preferably by means of retaining means, is secured to the seat reference fastening channel of the shell element. Advantageously, thus becomes shapely conclusion achieved between back panel and fabric. In addition, the assembly is considerably simplified.

Another object of the present invention is a vehicle seat comprising the seat part according to the invention. The seat part according to the invention forms in particular the backrest and / or the seat surface of the vehicle seat.

Further details, features and advantages of the invention will become apparent from the drawings and from the following description of preferred embodiments with reference to the drawings. The drawings illustrate only exemplary embodiments of the invention, which do not limit the essential inventive idea.

Brief description of the drawings

FIG. 1 shows a schematic cross-sectional view of a seat part according to an exemplary embodiment of the present invention.

FIG. 2 shows a schematic perspective view of a shell element of FIG

Seat part according to the exemplary embodiment of the present invention.

FIG. 3 shows a schematic exploded view of the seat part according to the exemplary embodiment of the present invention.

Embodiments of the invention

In the various figures, the same parts are always provided with the same reference numerals and are therefore usually named or mentioned only once in each case.

1 shows a schematic cross-sectional view of a seat part 1 according to an exemplary embodiment of the present invention. In the present example, the seat part 1 comprises the backrest of a vehicle seat.

The seat part 1 has a rigid shell element 2, which acts as a load-bearing support element or structural component for the backrest. The shell element 2 is for this purpose, for example injection molded from plastic. At the same time the shell element 2 serves as Rear wall of the seat part 1. The shell element 2 has a substantially U-shaped cross-section, which comprises a flat main section 3, at the edges of which two angled side cheeks 4 extend. Seat cover fastening channels 5 (also called trim channels) are molded integrally into the shell element 2 on the respective side wall edges. These seat cover attachment channels 5 are used to attach holding means (not shown) of a cover fabric (not shown) by hanging.

Further, the seat part 1, a contour element 6, which gives the user facing seat or back surface an ergonomically pleasing contour. For this purpose, the contour element 6 is rigid or semi-rigid, so that it retains its shape even when pressure is applied by a user. On a side facing the user, the contour element 6 is provided with a padding element 11, for example a foamed padding and / or a spacer knit (also referred to as a 3D fabric). Between the contour element 6 and the shell element 2, d. H. on a the padding element 1 1 facing away side of the contour element 6, spring elements 12 are arranged. About this designed as a compression springs spring elements 12, the contour element 6 is resiliently mounted on the shell element 2. By this suspension a comparatively high seating comfort is achieved for the user. Due to the rigid or at least semi-rigid design of the contour element 6 a uniform and controlled pressure distribution is achieved. The spring elements 12 are formed in the present example as U-springs (but there are also other spring shapes conceivable), whereby in the area between the shell element 2 and the contour element 6 additional space, for example, for receiving 14 of airbags or recordings for the headband 15 (not shown) of a headrest is formed. In the present example, a side airbag 13 is arranged in a corner region of the shell element 2, which unfolds in the case of release through the longitudinal slot between the respective seat attachment channel 5 and the corresponding contour element edge. The spring elements 12 optionally have an integrated damper element, which is provided for adjusting the compression during insertion. The jounce behavior depends on the spring 12 (or its spring constant), the compliance of the relevant surface of the contour element 6 itself and the resilience of the pad 1 1.

The padding element 1 1 is usually covered with the above-mentioned cover fabric, which is fastened by means of the holding means to the seat cover attachment channels 5 (not shown). However, it is also conceivable that the upholstery element 11 comprises an air-permeable spacer knitted fabric, which may be thinner than a foam layer and in which the upper material, such as the upholstery fabric, is directly integrated. alternative the padding element 1 1 comprises a thin foam layer, preferably with layer thicknesses between 10 and 30 millimeters.

FIG. 2 shows a schematic perspective view of the shell element 2 of the seat part 1 according to the exemplary embodiment of the present invention. It can be seen that the side airbag extends along the corner region of the shell element 2. In the upper region of the shell member also the receptacle 14 for the headband 15 (not shown) of the headrest is arranged. FIG. 3 shows a schematic exploded view of the seat part 1 according to the exemplary embodiment of the present invention. In this illustration, the headband 15 are shown schematically the headrest. In addition, the shape of the contour element 6 can be seen, which is preferably produced by injection molding of a plastic.

The contour element 6 comprises a slightly curved back region 7 (see FIG. 3) on which a sidewall region 8 is laterally arranged. The side cheek area 8 is arranged at an angle relative to the back region 7 in order to provide lateral support to the user of the seat part 1, in particular when cornering. In order to minimize the weight of the seat part 1 and to provide good ventilation, the contour element 6 is provided with a plurality of passage openings 9. In some areas, such as in the lumbar region, the contour element 6 is further provided with slots 10 in order to achieve a higher flexibility of the contour element 6 in these areas, so that the contour element 6, here on the back of a user, snuggles better. In addition, the contour element 6 has stiffening beads 16 in the transition region between the back region 7 and the side cheek regions 8, which stiffen the contour element 6 in this region. FIG. 3 also shows the four spring elements 12 by means of which the contour element 6 is resiliently fastened to the shell element 2. LIST OF REFERENCE NUMBERS

1 seat part

2 shell element

3 main section

4 side cheek

5 seat cover mounting channel

6 contour element

7 back area

8 sidewall area

9 passage opening

10 slot

1 1 padding element

12 spring element

13 side airbag

14 recording

15 retaining clips

16 stiffening bead

Claims

1 . Seat part (1), in particular a backrest for a vehicle seat, comprising a shell element (2), a cushioning element (11) and a contour element (6) arranged between the shell element (2) and the cushioning element (11), wherein between the shell element (2) 2) and the contour element (6) at least one spring element (12) is arranged, wherein the contour element (6) has elastic regions and at least two regions with different stiffnesses and wherein the contour element (6)

- A plurality of slots (10) and / or through holes (9) and

A plurality of stiffening beads (16)

having.

2. seat part (1) according to claim 1, wherein the shell element (2) is designed as a rigid or at least semi-rigid support member.

3. seat part (1) according to any one of the preceding claims, wherein the shell element (2) made of plastic and in particular injection molded and / or wherein the shell element (2) forms a rear wall of the seat part (1).

4. seat part (1) according to any one of the preceding claims, wherein the shell element (2) has a receptacle for a side airbag (13) and / or a receptacle (14) for a headband (15) of a headrest.

5. seat part (1) according to any one of the preceding claims, wherein the shell element (2) has a seat cover attachment channel (5) which is in particular integrally formed in side cheek edges of the shell element (2).

6. seat part (1) according to any one of the preceding claims, wherein the contour element (6) contoured for providing a seat occupant facing seat contour and is rigid or at least semi-rigid.

7. seat part (1) according to one of the preceding claims, wherein the contour element (6) has at least one back region (7) and two opposite the back region (7) inclined side cheek areas (8).

8. seat part (1) according to one of the preceding claims, wherein the contour element (6) made of plastic and in particular injection molded.

9. seat part (1) according to any one of the preceding claims, wherein the spring elements (12) comprise bending springs and in particular U-springs and / or wherein the spring elements (12) are made of metal.

10. seat part (1) according to any one of the preceding claims, wherein the padding element (1 1) comprises a foam part and / or a spacer fabric.

1 1. Seat part (1) according to one of the preceding claims, wherein the upholstery element (1 1) is covered on a side facing the user with a covering material, wherein the cover material is preferably fastened by means of retaining means on Sitzbezugbefes- tigungskanal (5) of the shell element (2).

12. vehicle seat comprising a seat part (1) according to one of the preceding claims.