DE102018203461A1 - vehicle seat - Google Patents

Abstract

A vehicle seat (1) having a lower seat part (10) and a seat backrest (12) which is pivotable relative thereto, the seat being adjustable between a sitting position and a resting or lying position by means of a position adjustment device (11), the lower seat part (10) a seat padding (14) provided with a seat cushion (14 ') between a seat structure (13) and a seat cover (15), the seat back (12) having a backrest padding with a backrest cushion provided between a backrest structure and a backrest cover, and wherein the hardness the seat padding (14) by means of a seat hardness adjustment (3, 3 ', 3 ", 3"') is adjustable and / or the backrest upholstery is adjustable by means of a Lehnenhärteverstelleinrichtung, characterized in that the position adjustment device (11) is designed so that they, either manually operated or automatically with an adjustment of the vehicle seat (1) from the sitting position in the rest or Lieposposit ion actuated, the seat hardness adjustment (3, 3 ', 3 ", 3"') and / or the Lehnenhärteverstelleinrichtung applied in such a way that the seat cushioning (14) and the backrest upholstery is harder.

Description

TECHNICAL AREA

The invention relates to a vehicle seat according to the preamble of claim 1. It further relates to a vehicle, in particular a motor vehicle, with at least one such vehicle seat.

BACKGROUND OF THE INVENTION

In sitting positions with a strongly inclined seat back (resting or reclining position), there is the possibility that the body of a passenger lying on the seat in the event of a collision, especially a frontal collision, at least partially slips under the seat belt (so-called "submarining"). If the passenger slips forward with the buttocks, it may happen that its body abuts the front edge of, for example, a seat shell having seat structure, which should be prevented.

STATE OF THE ART

To prevent such a submarining, it is already known from the prior art to provide airbags in the seat, which - like other airbags also - trigger in the event of a collision.

From the DE 195 04 975 A1 a vehicle seat is known, in the front region of the seat an airbag is provided under the seat cushion, which triggers in the event of a collision, and thereby changes the contour of the seat by small cusps are formed on the front of the seat, which act in a braking action on a body.

A similar vehicle seat is from the DE 100 65 464 A1 known. There, the seat cushion is made harder by a triggering in the event of a collision airbag in the seat bottom compresses the upholstery foam. By a harder seat, the distance that a passenger can slip on the seat forward, shortened and he should be slowed down when sliding and the retention of the pelvis should be improved, which is to prevent its penetration to the hard seat structure. Instead of a hardening of the seat cushion by means of the triggering in the event of a collision airbags, the seat cushion can also be switched hard by means of a magnetorheological fluid by generating a magnetic field acting thereon.

The DE 198 44 307 A1 and the DE 10 2004 027 437 A1 show and describe vehicle seats, in which strain rate dependent foams are provided in the seat cushion. These become automatically harder with fast impressions of the seat, as is the case with a collision.

The known airbag solutions have the disadvantage that they require a complex pyrotechnics in the seat. Moreover, they only trigger in extreme cases. However, a slight collision or strong braking can lead to unpleasant slipping of a passenger's pelvis on the seat. In addition, the known airbag solutions only react to an already occurred collision, which has a certain time delay. The solution with a magnetorheological fluid is structurally very expensive. The strain rate-dependent foams are limited in their effect and limit, similar to the magnetorheological fluid, the creative freedom, since no longer any cushioning material can be used, which may be better suited for normal sitting comfort.

PRESENTATION OF THE INVENTION

Object of the present invention is to provide a generic vehicle seat in such a way that with not too great technical effort in the event of a collision submarining a lying on the lying in his resting or reclining seat passenger position is possible prevented.

This object is achieved with the features of patent claim 1.

Such a vehicle seat is provided with a lower seat portion and a seat back pivotable relative thereto, the seat being adjustable by means of a position adjustment between a seated position and a resting or reclining position, the lower seat portion comprising a seat cushion provided between a seat structure and a seat cover with a seat cushion wherein the seat back has a provided between a backrest structure and a backrest cover backrest upholstery with a backrest cushion and wherein the hardness of the seat cushion is adjustable by means of a seat hardness adjustment and / or the backrest upholstery is adjustable by means of a Lehnenhärteverstelleinrichtung. According to the invention, the position adjustment device is designed such that it actuates, either manually or automatically actuated upon adjustment of the vehicle seat from the sitting position in the rest or reclined position, the seat hardness adjustment and / or Lehnenhärteverstelleinrichtung applied so that the seat upholstery or the backrest upholstery is harder.

ADVANTAGES

In the vehicle seat according to the invention, the pad in the seat part and / or the backrest pad are hardened depending on the application, thereby preventing the submarining effect in the lying position. With a vehicle seat oriented in the direction of travel, in the event of a frontal collision, it may be sufficient to only harden the cushion in the seat part. In a seat oriented counter to the direction of travel, it may be sufficient in the event of a frontal collision to only harden the backrest cushion. If both pads are hardened, the inventive solution can be effective both in a frontal impact and in a rear impact.

In contrast to the solutions known from the prior art, the upholstery hardening in the vehicle seat according to the invention is not first triggered by a collision, but always takes place when the vehicle seat is moved from the sitting position to the rest or reclined position. So it is provided an adaptive, depending on the seating position seat hardness.

The inventors have recognized that in the resting or lying position not the entire weight of the upper body is supported on the support point of the buttocks on the seat surface of the lower seat part, but that the weight over the entire support surface of the upper body, ie on the upholstery of the seat back , distributed. Therefore, a harder seat upholstery in the lower seat part in this case is not perceived as unpleasant and thus brings no comfort disadvantage with it.

Further preferred and advantageous design features of the vehicle seat according to the invention are the subject of the dependent claims 2 to 8th ,

Preferably, the seat hardness adjustment device and / or the Lehnenhärteverstelleinrichtung are formed to exert a compression on the seat cushion or the backrest cushion to increase the hardness of the seat cushion or the backrest cushion. The increase in the seat hardness is achieved by squeezing or displacing the pad in question.

Of particular advantage is an embodiment according to which the seat hardness adjustment device has at least one seat-side compression element arranged between the seat structure and the seat cushion.

Preferably, as an alternative or in addition thereto, it can preferably be provided that the backrest hardness adjustment device has at least one seat-side compression element arranged between the backrest structure and the backrest cushion.

In a first variant of the vehicle seat according to the invention, it is provided that the respective compression element has at least one cushion which can be filled with a fluid, preferably with air.

In a second variant of the vehicle seat according to the invention, it is provided that the respective compression element has at least one pressure element which can be actuated by a drive unit by means of a lifting mechanism.

In a third variant of the vehicle seat according to the invention it is provided that the respective compression element has at least one clamping body which is operatively coupled to the associated seat cushion or backrest cushion and which is connected to an associated drive unit which the clamping body for compression of the associated seat cushion or backrest cushion with a Tensile force applied.

In a fourth variant of the vehicle seat according to the invention, it is provided that the respective compression element has at least one gas-impermeable enclosure surrounding the seat cushion or the backrest padding and at least one vacuum pump, which is connected on the suction side to the interior of the enclosure.

Different variants of the inventive solution for seat hardness adjustment can also be combined in a vehicle seat. For example, a variant can be realized in the lower seat part, while another variant is realized in the seat back. Also within the lower seat part or within the seat backs, respectively different variants of the solution according to the invention for seat hardness adjustment can be provided cumulatively.

The invention is also directed to a vehicle having at least one inventively designed vehicle seat.

Preferred embodiments of the invention with additional design details and other advantages are described below with reference to the accompanying drawings and described.

list of figures

• 1 einen herkömmlichen Fahrzeugsitz mit in einem vertikalen Längsschnitt dargestellten unteren Sitzteil;
• 2 einen erfindungsgemäßen Fahrzeugsitz in einer ersten Variante in analoger Darstellung zur 1;
• 3 einen erfindungsgemäßen Fahrzeugsitz in einer zweiten Variante in analoger Darstellung zur 1;
• 4 einen erfindungsgemäßen Fahrzeugsitz in einer dritten Variante in analoger Darstellung zur 1 und
• 5 einen erfindungsgemäßen Fahrzeugsitz in einer vierten Variante in analoger Darstellung zur 1.

It shows:

• 1 a conventional vehicle seat having a lower seat portion shown in a vertical longitudinal section;
• 2 a vehicle seat according to the invention in a first variant in an analogous representation to 1 ;
• 3 a vehicle seat according to the invention in a second variant in an analogous representation to 1 ;
• 4 a vehicle seat according to the invention in a third variant in an analogous representation to 1 and
• 5 a vehicle seat according to the invention in a fourth variant in an analogous representation to 1 ,

PRESENTATION OF PREFERRED EMBODIMENTS

1 shows a vehicle seat 1 with a conventional seat construction. This seat structure is basically also in the inventively designed variants of the vehicle seat 1 realized. The vehicle seat 1 has a lower seat part 10 and a relatively pivotable seat back 12 on. The lower seat part 10 is about a seat console shown only schematically 20 with the structure 22 of a vehicle 2 connected to this vehicle seat 1 Is provided.

The vehicle seat 1 is in a conventional manner by means of a position adjustment 11 provided that allows the vehicle seat 1 is adjustable between a sitting position and a resting or lying position. In the sitting position is the seat back 12 with its backrest surface 12 ' opposite the seat 10 ' of the lower seat part 10 only slightly (about 5 ° to 30 °) tilted backwards or the seat back 12 is essentially upright (inclination approx. 0 ° to 5 °). In the figures, the resting or lying position of the vehicle seat 1 shown in the seat back 12 with its backrest surface 12 ' opposite the seat 10 ' of the lower seat part 10 is significantly more inclined. The angle of inclination is α for example 60 ° or more.

The lower seat part 10 is with a lower seat structure 13 fitted with the seat console 20 for example, longitudinally and / or height-adjustable connected. The lower seat structure 13 has a seat shell 13 ' on, which is a seat cushion arranged above it 14 picks up and weighs the one on the vehicle seat 1 is supported by a seated person. This seat shell 13 ' is on its front, that of the seat back 12 opposite side of the lower seat part 10 with an upwardly extending leading edge 13 " Provided. This front edge 13 " In the upright sitting position, it supports the seat upholstery while driving 14 in the vehicle longitudinal direction X acting forces and prevents slipping out of the seat upholstery 14 forward from the seat 13 ' ,

The seat upholstery 14 is with a seat cushion 14 ' provided, which is usually made of an open-cell, foamed and compressible material. The seat upholstery 14 is from a seat cover 15 coated on the sides with the seat shell 13 ' is connected and so the seat upholstery 14 with her seat cushion 14 ' between the seat shell 13 ' and the seat cover 15 clamps.

The elasticity of the seat cushion 14 ' determines the seat hardness, which is set as a compromise between comfort and supportability. Here is the seating area under the buttocks on the vehicle seat 1 Sitting person usually designed softer than the side bolsters to give the seat with comfortable seating yet good cornering properties. However, this softer interpretation of the seating area shown in section in the figures leads to the fact that the seat cushion 14 ' in the resting or reclining position at one in the direction of the vehicle longitudinal axis X on the vehicle 2 acting collision force only slightly supports the body of a person lying on the vehicle seat and the predominant support of the force acting on the body acceleration forces through the seat 13 ' and in particular by its raised leading edge 13 " he follows.

In order to improve this support of the lying body in the event of a collision and to decelerate it more effectively and gently, the vehicle seat according to the invention 1 with a seat hardness adjustment device 3 equipped, by means of the hardness of the seat upholstery 14 is adjustable. This is for the tilt adjustment of the seat back 12 provided Lageverstelleinrichtung 11 designed so that they in an adjustment of the vehicle seat 1 from the sitting position to the resting or lying position when exceeding a threshold value of the angle of inclination α the seat hardness adjustment device 3 . 3 ' . 3 ' . 3 '' ( 2 to 5 ) so acted upon, that the seat upholstery 14 gets harder. This threshold may for example be between 30 ° and 60 °, preferably between 40 ° and 50 °, more preferably 45 °. The admission of the seat hardness adjustment device 3 . 3 ' . 3 ' . 3 '' ( 2 to 5 ) with a signal for seat hardness adjustment by the Lageverstelleinrichtung 11 is preferably done automatically due to a seat tilt sensor 30 determined angle of inclination α the seat back 12 if that determined angle of inclination α reaches or exceeds a predetermined threshold.

Based on 2 to 5 Below are different devices for seat hardness adjustment using the example of the lower seat part 10 of the vehicle seat 1 described in which the seat hardness adjustment 3 . 3 ' . 3 ' . 3 '' ( 2 to 5 ) At least one on the seat cushion 14 ' acting compression element 30 . 30 ' . 30 " . 30 '' in the lower part of the seat 10 having.

In the 2 shown first variant of the seat height adjustment 3 of the vehicle seat according to the invention has a cushion which can be filled by a fluid, for example air 32 at the bottom of the seat cushion 14 ' is integrated in this or that between the seat shell 13 and the seat cushion 14 ' is arranged. When filling the pillow 32 with the fluid by means of a pump 32 ' from a fluid reservoir 32 " can be done, the seat cushion 14 ' against the tension of the seat cover 15 compressed. By this compression of the foam material of the seat cushion 14 ' increases the hardness of the seat cushion 14 ' on; the seat upholstery will be harder.

In contrast to the known from the prior art airbag solutions in the subject invention no pyrotechnic ignition device is provided and also not required because the cushion 32 by the example designed as a compressor pump 32 ' be filled with air at any time and emptied again. As a result, a permanent activation in Liege case is possible. The operation of the pump 32 ' and thus the activation of the seat hardness adjustment device 3 may alternatively or additionally to the described automatic also be done manually by means of a corresponding switch.

Instead of the one inflatable cushion 32 it is also possible to provide a plurality of pads which can be filled with the fluid. For example, in each case a tubular cushion under a thigh and under the buttocks on the vehicle seat 1 be arranged sitting person.

In 3 is a variant of the seat height adjustment 3 ' the vehicle seat according to the invention 1 with one of a drive unit 33 operable and on a pressure hull 34 acting lifting mechanism 35 shown in the as a compression element 30 ' at least one plate 34 ' as a pressure body 34 in the lower part of the seat cushion 14 ' is integrated in this or between the seat pan 13 and the seat cushion 14 ' is arranged. The plate 34 ' is in one to the seat 13 ' essentially at right angles or with a direction extending to this orthogonal direction component direction by means of the drive unit 33 applied lifting mechanism ' 35 movable. The lifting mechanism 35 In the example shown has a motor, for example by an electric motor 33 ' as a drive unit 33 , powered scissors gear 35 ' on; but other drive mechanisms can be provided. The seat cushion 14 ' is driven by the drive unit 33 , by means of at least one plate 34 ' pushed up and compressed, with the same effect as in the 2 shown variant.

4 shows a variant of the Sitzhöhenverstelleinrichtung 3 ' in which as a compression element 30 " a belt 36 ' having clamping body 36 over the seat cushion 14 ' extends. The belts 36 ' extend laterally of the seat on the seat cushion 14 ' go down and be under the seat 13 ' by one of a drive unit 37 ' , For example, an electric motor, driven clamping mechanism 37 , For example, a winding roll, pulled down, causing the seat cushion 14 ' is compressed, with the same effect as in the 2 and 3 shown variants.

5 shows a variant of the Sitzhöhenverstelleinrichtung 3 '' in which the compression element 30 '' one the seat cushion 14 ' surrounding gas impermeable cladding 38 and a vacuum pump 39 has, the suction side via a fluid line 38 ' with the interior of the cladding 38 connected is. About the vacuum pump 39 Air is from the foam material of the seat cushion 14 ' sucked off and the seat cushion 14 ' is compressed and hardened.

The above illustration of the invention using the example of the lower seat part 10 of the vehicle seat 1 However, it is not limited to this, but it can be analogous way additionally or alternatively in the seat back 12 be realized in order to harden the backrest upholstery by means of a Lehnenhärteverstelleinrichtung. This variant is particularly advantageous if the vehicle seat 1 against the direction of travel in the vehicle 2 is installed or in the event of a rear impact, the vehicle 2 ,

The invention is not limited to the above embodiment, which merely serves to generally explain the essence of the invention. Within the scope of protection, the device according to the invention may also assume other than the above-described embodiments. In this case, the device may in particular have features that represent a combination of the respective individual features of the claims.

Reference signs in the claims, the description and the drawings are only for the better understanding of the invention and are not intended to limit the scope.

LIST OF REFERENCE NUMBERS

1

vehicle seat

2

vehicle

3

Sitzhärteverstelleinrichtung

3. '

Sitzhärteverstelleinrichtung

3 '

Sitzhärteverstelleinrichtung

3 ''

Sitzhärteverstelleinrichtung

10

lower seat part

10 '

seat

11

Lageverstelleinrichtung

12

swivel seat back

12 '

backrest surface

13

seat structure

13 '

seat

13 "

leading edge

14

seat upholstery

14 '

seat cushion

15

seat cover

20

Sitzkonsole

22

Structure of a vehicle

30

compression member

30 '

compression member

30 "

compression member

30 ''

compression member

32

fillable pillow

32 '

pump

33

drive unit

33 '

electric motor

34

pressure vessels

34 '

plate

35

lifting mechanism

35 '

scissors gear

36

tensioning body

36 '

belt

37

tensioning mechanism

37 '

electric motor

38

wrapping

38 '

fluid line

39

Vacuum pump

X

vehicle longitudinal axis

α

tilt angle

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 19504975 A1 [0004]
• DE 10065464 A1 [0005]
• DE 19844307 A1 [0006]
• DE 102004027437 A1 [0006]

Claims (9)

Vehicle seat (1) with a lower seat part (10) and a seat backrest (12) which can be pivoted relative thereto, the vehicle seat (1) being adjustable by means of a position adjustment device (11) between a seated position and a resting or lying position, wherein the lower seat part ( 10) has a seat cushion (14 ') provided between a seat structure (13) and a seat cover (15), wherein the seat back (12) has a backrest padding with a backrest cushion provided between a backrest structure and a backrest cover, and wherein the hardness of the seat upholstery (14) is adjustable by means of a seat hardness adjustment device (3, 3 ', 3 ", 3"') and / or the backrest upholstery is adjustable by means of a backrest hardness adjustment device, characterized in that the position adjustment device (11) is designed such that they, either manually operated or automatically in an adjustment of the vehicle seat (1) from the sitting position in the rest or Lieg actuated eposition, the seat hardness adjustment (3, 3 ', 3 ", 3"') and / or the Lehnenhärteverstelleinrichtung applied so that the seat upholstery (14) or the backrest upholstery is harder. Vehicle seat after Claim 1 , characterized in that the seat hardness adjustment (3, 3 ', 3 ", 3"') and / or the Lehnenhärteverstelleinrichtung are formed to increase the hardness of the seat cushion (14) and the backrest cushion, a compression on the seat cushion (14) or to exercise the backrest cushion. Vehicle seat after Claim 1 or 2 , characterized in that the seat hardness adjustment device (3, 3 ', 3 ", 3"') at least one between the seat structure (13) and the seat cushion (14) arranged seat-side compression element (30, 30 ', 30 ", 30"') having. Vehicle seat after Claim 1 . 2 or 3 , characterized in that the Lehnenhärteverstelleinrichtung has at least one disposed between the backrest structure and the backrest cushion side-facing compression element. Vehicle seat after Claim 3 or 4 , characterized in that the respective compression element (30) at least one with a fluid, preferably with air, fillable cushion (32). Vehicle seat after Claim 3 or 4 , characterized in that the respective compression element (30 ') at least one by means of a lifting mechanism' (35) of a drive unit (33) operable pressure body (34). Vehicle seat after Claim 3 or 4 , characterized in that the respective compression element (30 ") at least one clamping body (36) which is operatively coupled to the associated seat cushion (14 ') or backrest cushion and which is connected to an associated drive unit (37'), which the clamping body (36) for compressing the associated seat cushion (14 ') or backrest pad applied with a tensile force. Vehicle seat after Claim 3 or 4 , characterized in that the respective compression element (30 "') at least one the seat cushion (14') or the backrest cushion surrounding gas-impermeable enclosure (38) and at least one vacuum pump (39), the suction connected to the interior of the enclosure (38) is. Vehicle, in particular motor vehicle, with at least one vehicle seat according to one of the preceding claims.

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