DE102022105298A1 - motor vehicle seat - Google Patents

Abstract

The invention relates to a motor vehicle seat, comprising a backrest, a seat element with a rear cushion element and a front cushion element, a seat depth adjustment device for adjusting the front cushion element relative to the rear cushion element between a retracted position and an extended position, and a support element for supporting the front cushion element. The support member is bendable about a transversely extending axis.

Description

The present invention relates to a motor vehicle seat having the features of the preamble of patent claim 1.

Motor vehicle seats are known in various configurations from the prior art.

The DE 10 2020 121 632 A1 describes a vehicle seat with a lower seat part having a seat surface, a seat back and a seat depth adjustment device for longitudinal adjustment of a front seat surface area designed as a thigh support.

At the one from the DE 10 2020 121 632 A1 known vehicle seat, however, there can be an uncomfortable feeling of pressure in the knee or calf area of a person on the seat.

The object of the present invention is to provide a motor vehicle seat with increased comfort.

According to the invention, this object is achieved by the motor vehicle seat having the features of patent claim 1 .

A motor vehicle seat is therefore provided which comprises a backrest, a seat element, a seat depth adjustment device and a support element. The seat member includes a rear cushion member adjacent to the backrest and a front cushion member longitudinally forward of the rear cushion member. The seat depth adjustment device serves to adjust the front upholstered element relative to the rear upholstered element, in particular in the longitudinal direction. By means of the seat depth adjustment device, the front cushion element can be adjusted between a retracted position, in which the front cushion element is arranged close to or on the rear cushion element in the longitudinal direction, and an extended position. In the extended position, the front cushion member is displaced longitudinally forward. The support member is provided for supporting the front cushion member.

The front padding element thus follows the shape of the supporting element. The support member is bendable about a transverse axis, i.e. the curvature of the support member is variable about the transverse axis. Because the front cushioning member follows the shape of the support member, the front support member is also flexable about the transverse axis.

The core idea of the invention is therefore to design the support element in such a way that, when it is extended forwards into the extended position, and therefore at least partially no longer rests on a seat element basic structure, which specifies an at least approximately straight shape of the element, in the vertical direction is bendable at the bottom about a transversely extending axis.

That part of the support element which is arranged in front of the seat element basic structure in the extended position and therefore no longer rests on it is arcuate when viewed from the side.

The front cushion element can thus be used as a calf support in the extended state by a person sitting on the motor vehicle seat. This increases the comfort for the person sitting on the motor vehicle seat.

The front cushion element is fixed, for example, on the support element.

The support element can also be integrated into the front cushion element.

In a preferred embodiment of the motor vehicle seat according to the invention, the supporting element can be bent in an arc shape by a defined angle about the axis extending in the transverse direction.

The defined angle relates to an angle enclosed by a first straight line and a second straight line. The first line and the second line intersect on the transverse axis. The first straight line intersects the front end of the carrier element in the longitudinal direction. The second straight line runs orthogonally to the extension of the support element in the retracted position.

The second straight line extends vertically, for example.

The defined angle can be less than 90 degrees, in particular less than 60 degrees.

The arc shape of the support element can have a constant or a discontinuous curvature.

The seat depth adjuster may include a drive unit such that the front cushion member automates relative to the rear cushion member between the retracted position and the extended position is adjustable, in particular displaceable in the longitudinal direction.

In an exemplary embodiment of the motor vehicle seat according to the invention, the support element comprises at least two, in particular a multiplicity of members, which are connected to adjacent members in such a way that they can be pivoted relative to one another about a pivot axis extending in the transverse direction.

The links extend, for example, in the transverse direction.

The links can each be connected to adjacent links via a rotary joint, in particular a hinge joint.

In a preferred embodiment of the motor vehicle seat according to the invention, the members each comprise a stop element and a retaining lug. When the members reach the defined pivoting angle in the extended position, the stop elements each rest against an adjacent retaining lug in such a way that further pivoting of the members relative to one another and therefore of the support element is prevented.

In a preferred embodiment of the motor vehicle seat according to the invention, the support element is formed from an elastically deformable material, includes partial areas made of the elastically deformable material or includes an elastically deformable material.

The elastically deformable material is, for example, a fiber composite material, a plastic or a metal.

In an exemplary embodiment of the motor vehicle seat according to the invention, the elastically deformable material is an organic sheet. Organo sheets are fiber matrix semi-finished products consisting of a fiber fabric or a fiber fabric embedded in a thermoplastic matrix.

The support element can be designed in one piece and have a constant thickness.

The support element is designed in one piece, for example, with the links being delimited from adjacent links by tapered material. The material tapers allow, for example, pivoting of the links relative to one another, in particular because they are elastically deformable.

The limbs may have greater stiffness than the material tapers.

In an exemplary embodiment of the motor vehicle seat according to the invention, a support element is arranged on the underside of the support element between the links.

In the extended position, the front and/or rear of the limbs can rest on support elements which they directly adjoin, in such a way that further pivoting of adjacent limbs relative to one another is prevented.

The supporting element has, for example, the shape of a three-sided prism, in particular the shape of a three-sided, regular, right prism.

In a preferred embodiment of the motor vehicle seat according to the invention, the members each have the shape of a four-sided prism. The links can thus support each other when the support element is bent, i.e. they each form a supporting contour for adjacent links. As a result, a maximum pivoting angle of the links relative to one another is fixed.

The prisms each comprise, for example, a base area, a cover area and a lateral area.

The base surfaces and the cover surfaces form, for example, the side surfaces of the links.

The side surfaces of the links may have the shape of a trapezium.

The trapezoid can have exactly two equal sides.

Alternatively, the trapezoid can have four sides of different lengths.

For example, the tops of the links are larger than the bottoms of the links.

The prism can be isosceles.

The links can be supported on one another via the lateral surfaces, in particular the front and rear sides of the lateral surfaces of the prisms in the longitudinal direction.

In a preferred embodiment, the motor vehicle seat according to the invention comprises a spring which can be tensioned by bending the support element about the axis extending in the transverse direction. Thus, when no external force acts on the support member or the cushion member, the spring flattens the support member and the front cushion member from the flexed position Position back, ie in an orientation in which the support member is not bent.

The spring is thus connected, for example, at a first end to a longitudinally rear region of the front cushioning element or the support element and at the second end to a longitudinally front region of the front cushioning element or the support element.

The spring can have such a tension force that an external force is required to bend the support element, i.e. to pivot the links or to deform the elastically deformable material. The spring is therefore not stretchable by the weight of the support element and/or the front cushion element. The tension force of the spring is accordingly greater than a weight force of the support element and the front cushion element. Consequently, the support element is pivoted only when an external force is applied. The support element and thus the front upholstery element are pivoted, for example, when a person sitting on the seat places their calves on the front seat upholstery. The front cushion element thus adapts to the person in the seat.

The seat depth adjustment can include at least one guide rail, in which the support element is arranged in the retracted position.

The guide rail can secure the support element and therefore the front cushion element in the retracted position against displacement in the vertical and transverse directions.

The guide rail can include an insertion aid at a front end, which makes it easier to insert the support element into the guide rail.

The insertion aid is a bevel, for example.

The guide rail can be arranged laterally on the support element.

In an exemplary embodiment, the motor vehicle seat according to the invention comprises two guide rails which are arranged laterally on the support element, in particular receiving the support element laterally when the support element is in the retracted position.

In a preferred embodiment, the motor vehicle seat according to the invention comprises a seat cover. The seat cover covers at least the top of the rear cushion member and the top of the front cushion member. The rear upholstery element and the front upholstery element can thus be connected to one another via the seat cover.

In the retracted position, a partial area of the seat cover is arranged, for example, between the rear seat element and the front seat element.

For example, in the extended position, the seat cover is fully tensioned.

• 1 eine Seitenansicht eines ersten Kraftfahrzeugsitzes nach der Erfindung mit einem vorderen Polsterelement in einer eingefahrenen Position;
• 2 eine Detailansicht eines Teilbereichs A des ersten Kraftfahrzeugsitzes aus 1;
• 3 eine 2 entsprechende Ansicht, wobei das vordere Polsterelement in einer ausgefahrenen Position ist;
• 4 eine Alleindarstellung eines Tragelements des ersten Kraftfahrzeugsitzes aus 1.
• 5 eine Seitenansicht eines Teilbereichs eines zweiten Kraftfahrzeugsitzes nach der Erfindung mit einem vorderen Polsterelement in einer eingefahrenen Position;
• 6 Längsschnitt durch den in 5 dargestellten Teilbereich des zweiten Kraftfahrzeugsitzes, ohne Darstellung des vorderen Polsterelements;
• 7 Längsschnitt durch den in 5 dargestellten Teilbereich des zweiten Kraftfahrzeugsitzes, wobei das vordere Polsterelement in einer Zwischenposition ist;
• 8 Längsschnitt durch den in 5 dargestellten Teilbereich des zweiten Kraftfahrzeugsitzes, wobei das vordere Polsterelement in einer ausgefahrenen Position ist; und
• 9 eine perspektivische Ansicht eines Teilbereichs eines Kraftfahrzeugsitzes nach der Erfindung mit einem vorderen Polsterelement in einer eingefahrenen Position.

The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawing. It shows:

• 1 a side view of a first motor vehicle seat according to the invention with a front cushion element in a retracted position;
• 2 a detailed view of a portion A of the first motor vehicle seat 1 ;
• 3 one 2 corresponding view with the front cushion member in an extended position;
• 4 an isolated representation of a support element of the first motor vehicle seat 1 .
• 5 a side view of a portion of a second motor vehicle seat according to the invention with a front cushion element in a retracted position;
• 6 Longitudinal section through the in 5 shown portion of the second motor vehicle seat, without showing the front cushion element;
• 7 Longitudinal section through the in 5 illustrated portion of the second motor vehicle seat, wherein the front cushion element is in an intermediate position;
• 8th Longitudinal section through the in 5 illustrated portion of the second motor vehicle seat, wherein the front cushion element is in an extended position; and
• 9 a perspective view of a portion of a motor vehicle seat according to the invention with a front cushion element in a retracted position.

In the 1 until 3 a first motor vehicle seat 2 according to the invention is shown. The first motor vehicle seat 2 comprises a backrest 6, a seat element 8 and a seat element basic structure 32 on which the seat element 8 is arranged.

The seat element 8 has a rear cushion element 10 and a front cushion element 12 . The front padding member 12 is arranged in front of the rear padding member 10 in the longitudinal direction. A seat cover 30 covers the front cushion member 12 and the rear cushion member 10.

The front cushion element 12 is arranged on a carrier element 14 . By means of a (not shown) seat adjustment device is the front cushion member 12 in the longitudinal direction relative to the rear cushion member 10 between a in the 1 and 2 shown retracted position and an in 3 shown extended position adjustable.

While partial areas of the seat cover 30 are arranged between the front cushion element 12 and the rear cushion element 10 in the retracted position, the seat cover 30 is stretched in the extended position.

As can be seen in particular from the representation of the carrier element 14 in 4 As can be seen, the support member 14 is made up of a plurality of links 16. The links 16 are each connected to adjacent links 16 by a pivot joint 18. As shown in FIG. Thus, the links 16 are pivotable relative to the adjacent links 16 about transversely extending pivot axes.

The links 16 each comprise a stop element 26 at a first end and a retaining lug 28 at a second end facing away from the first end. The stop elements 26 rest against the retaining lugs 28 of adjacent links 16 when a maximum pivot angle between adjacent links 16 is reached. Excessive pivoting of the links 16 relative to one another can thus be prevented and consequently a defined bending of the support element 14 can be achieved.

The 5 until 8th show a portion of a second motor vehicle seat 4 according to the invention. The second motor vehicle seat 4 essentially corresponds to that in FIGS 1 until 4 illustrated first motor vehicle seat 2, with the exception that members 34 of the second motor vehicle seat 4 are not connected to one another via the rotary joints 18 and no stop elements 26 and no retaining lugs 28 include.

Instead, the first ends of the links 34 are each provided with a socket 42 . A joint head 40 is arranged at each of the second ends. The socket joints 42 each form, together with the joint head 40 of the adjacent link 34, a pivot joint 36. By means of the pivot joints 36, the links 34 are pivotable relative to the adjacent links 34 about transversely extending pivot axes.

As in particular from the 6 until 8th As can be seen, which show a longitudinal section through a portion of the second motor vehicle seat 4, the joint sockets 42 each have an opening 44 through which the joint head 40 of an adjacent link 34 is introduced into the joint socket 42. The openings 44 are designed in such a way, in particular have such a size, that the joint heads in the joint sockets 42 can only be rotated through a defined angle. The size of the opening 44 consequently defines a maximum pivoting angle of adjacent links 34 relative to one another.

A portion of a third motor vehicle seat 20 according to the invention is in 9 shown. The third vehicle seat 20 differs from that in FIGS 1 until 4 illustrated first motor vehicle seat 4 due to the configuration of the carrier element 38.

The carrier element 38 of the third motor vehicle seat 20 is designed in one piece. Members 34 of the support member 38 are delimited from adjacent members 34 by material tapers 24 . In the areas of tapered material 24, carrier element 38 has a lower rigidity than in the areas of limbs 34. Tapered material 24 thus enables pivoting of limbs 34 relative to one another by elastic deformation about pivot axes extending in the transverse direction.

Reference list:

2

first motor vehicle seat

4

second motor vehicle seat

6

backrest

8th

seat element

10

rear padding

12

front padding

14

supporting element

16

element

18

swivel joint

20

third vehicle seat

22

limb (in 9 )

24

material rejuvenation

26

stop element

28

holding lug

30

seat cover

32

seat element basic structure

34

element

36

swivel joint

38

carrier element

40

rod end

42

socket

44

opening

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

• DE 102020121632 A1 [0003, 0004]

Claims (10)

Motor vehicle seat, comprising a backrest (6), a seat element (8) with a rear cushion element (10) and a front cushion element (12), a seat depth adjustment device for adjusting the front cushion element (12) relative to the rear cushion element (10) between a retracted position and an extended position and a support member (14, 38) for supporting the front cushion member (12), characterized in that the support member (14, 38) is deflectable about a transversely extending axis. motor vehicle seat claim 1 , characterized in that the support element (14, 38) can be bent by a defined angle about the axis extending in the transverse direction, the angle being less than 90 degrees. motor vehicle seat claim 1 or 2 , characterized in that the support element (14, 38) comprises a plurality of links (16, 22, 34) which are connected to adjacent links (16, 22, 34) by defined pivot angles, pivot axes extending in the transverse direction relative to each other , and/or that the support element (14, 38) consists of an elastically deformable material. motor vehicle seat claim 3 , characterized in that the links (16) are each connected to adjacent links (16) via a rotary joint (18, 36) or that the support element is designed in one piece, with the links (22, 34) of adjacent links (22, 34 ) are delimited by material tapers (24) which allow pivoting of the links (22, 34) relative to one another. motor vehicle seat claim 4 , characterized in that a support element is arranged on the underside of the support element between the links (16, 22, 34), wherein in the extended position links (16, 22, 34) adjoining the support element are on a first side of the support element or resting on a second side of the support member, or that the members (16, 22, 34) each have the shape of a four-sided prism, wherein in the extended position adjacent members (16, 22, 34) each abut one another such that a further pivoting of the links (16, 22, 34) relative to one another is prevented. motor vehicle seat claim 5 , characterized in that the supporting element has the shape of a three-sided prism. Motor vehicle seat according to one of claims 3 until 6 , characterized in that the members (16) each comprise a stop element (26) and a retaining lug (28), wherein in the extended position the stop elements (26) each rest against an adjacent retaining lug (28) in such a way that further pivoting is prevented is. Motor vehicle seat according to one of Claims 1 until 7 characterized by a spring which can be tensioned by bending the support element (14, 38) about the axis extending in the transverse direction. motor vehicle seat claim 8 , characterized in that the spring has such a tension force that an external force is required to bend the support element (14, 38). Motor vehicle seat according to one of Claims 1 until 9 , characterized by a seat cover (30) which covers the rear upholstery element (10) and the front upholstery element (12), wherein in the retracted position a partial area of the seat cover (30) lies between the rear upholstery element (10) and the front upholstery element (12 ) is arranged and in the extended position the seat cover (30) is fully tensioned.

Images