DE102020128810A1 - Vehicle seat with an anti-submersion device - Google Patents

Abstract

A vehicle seat with a seat bottom (10) and a seat back (12), wherein the seat bottom (10) has a seat bottom element (14) and a seat cushion (15) arranged thereon and wherein the seat bottom (10) is equipped with an anti-submersion device ( 2) which, in the event of a collision, causes the front part (15') of the seat cushion (15) facing away from the seat back (12) to be raised, is characterized in that the anti-immersion device (2) has a transverse axis (y) pivotally mounted on the seat bottom element (14) rocker element (20) which has a rear lever area (22) provided between the transverse axis (y) and the seat backrest (12) and a lever area extending from the transverse axis (y) to the front part (15 ') of the seat cushion (15) facing the front lever area (24).

Description

TECHNICAL AREA

The invention relates to a vehicle seat according to the preamble of patent claim 1, which is provided with an anti-immersion device for a passenger sitting on the vehicle seat. The invention also relates to a vehicle, in particular a motor vehicle, which is equipped with at least one such vehicle seat.

BACKGROUND OF THE INVENTION

In a frontal crash, vehicle occupants seated in forward-facing vehicle seats, particularly when their seatbacks are reclined from an upright position, can sink deeply into the seat cushion and possibly slide forward under the lap belt portion of their seatbelt, reducing the restraining action of the seatbelt is reduced. The same effect can occur in the event of a rear-end collision with rear-facing seats. In order to avoid such a diving through under the lap belt section, also known as “submarining”, the seat pan of the seat could be set up more steeply with its front end pointing upwards, but this entails a considerable loss of comfort in normal operation. An anti-submarining ramp rising towards the front could also be provided inside the lower seat cushion, but this also leads to disadvantages in terms of comfort.

STATE OF THE ART

From the DE 38 41 688 A1 a vehicle seat with a U-shaped bracket assigned to the seat cushion as a safety device is known. The bracket is mounted pivotably about a leg axis located in the rear area of the seat and can be pivoted upwards at the front by means of a pyrotechnic drive unit in the event of a vehicle collision in order to raise the seat cushion. A collision sensor system is required to trigger the pyrotechnic drive unit. A similar device is from DE 699 31 427 T2 famous.

the DE 199 43 595 A1 shows and describes a vehicle seat under the seat cushion in the front area of the seat an airbag is arranged, which is suddenly inflated in the event of a collision and raises the front part of the seat cushion either directly or by means of a pivoting ramp surface installed under the seat cushion, which prevents a person sitting on the vehicle seat dives under the lap belt in the event of a frontal collision. A triggering sensor system is also required for this in order to activate the airbag in the event of a collision.

PRESENTATION OF THE INVENTION

The object of the present invention is to improve a generic vehicle seat in such a way that submarining is prevented in a simple and reliable manner without sacrificing comfort.

This problem is solved with the features of patent claim 1.

A vehicle seat with a seat base and a seat back, the seat base having a seat bottom element and a seat cushion arranged thereon, and the seat base being provided with an anti-submersion device which, in the event of a collision, causes the front part of the seat cushion facing away from the seat back to be raised , is characterized according to the invention in that the anti-immersion device has a rocker element which is mounted on the seat bottom element and can be pivoted about a transverse axis and which has a rear lever area provided between the transverse axis and the seat backrest and a front lever area pointing from the transverse axis to the front part of the seat cushion .

BENEFITS

In the event of a collision, the rear area of the rocker element, which is provided below the seat foam of the seat cushion and is rotatably mounted on the seat base element, is pushed down by the occupant plunging into the seat cushion without the need for external drive elements or a control mechanism. This steepens the occupant's thighs in a simple mechanical manner, preventing submarining.

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

Preferably, the rear lever area forms at least one rear lever arm that extends backwards from the transverse axis in the longitudinal direction of the vehicle seat, and the front lever area forms at least one front lever arm that extends forwards from the transverse axis in the longitudinal direction of the vehicle seat, and the rear lever arm is shorter than the front lever arm. This lever mechanism ensures that the path to which the front part of the seat cushion moves and thus the front area of a passenger's thighs is lifted significantly more than the passenger's body sinks into the seat cushion in the rear part of the seat, resulting in a particularly effective prevention of submarining, since the horizontal forces emanating from the inertial forward movement of the passenger are particularly effectively on the front, erected area of the rocker element.

It is of particular advantage if the front lever arm is 1.5 to 2.5 times longer than the rear lever arm.

It is also advantageous if the rocker element is designed as a bracket construction which has a rear bracket with a rear left arm and a rear right arm, which are each mounted pivotably about the transverse axis and which are connected to one another via at least one rear cross brace. Such a lightweight construction can be integrated into the vehicle seat in a particularly space-saving manner.

The at least one rear cross brace is preferably provided with at least one pressure plate or designed as a pressure plate. This achieves a particularly effective transmission of force between the body of a passenger seated on the vehicle seat and the rocker element.

It is particularly advantageous if the at least one rear transverse strut or a pressure plate forming or connected to the rear transverse strut is located under the seat cushion in a region of the lower seat part in which the contact points of the seat legs of a passenger sitting on the vehicle seat are located, which is also leads to a particularly effective and instantaneous introduction of force.

The rocker element is preferably designed as a bracket construction which has a front bracket with a front left leg and a front right leg which are each mounted pivotably about the transverse axis and which are connected to one another via at least one front cross brace.

Here, too, it is advantageous if the at least one front cross brace is provided with at least one pressure plate or is designed as a pressure plate.

The invention is also aimed at a vehicle, in particular at a motor vehicle, which is equipped with at least one vehicle seat designed according to the invention.

Preferred exemplary embodiments of the invention with additional design details and further advantages are described and explained in more detail below with reference to the attached drawing.

character list

• 1 einen teilweise geschnitten in einer Seitenansicht dargestellten Fahrzeugsitz mit einer erfindungsgemäßen Anti-Eintauch-Vorrichtung im inaktivierten Zustand;
• 2 eine Draufsicht auf den teilweise geschnitten dargestellten Fahrzeugsitz aus 1 in Richtung des Pfeils II und
• 3 den Fahrzeugsitz aus 1 mit aktivierter Anti-Eintauch-Vorrichtung.

It shows:

• 1 a vehicle seat shown partially in section in a side view with an anti-submersion device according to the invention in the inactivated state;
• 2 a plan view of the partially sectioned vehicle seat 1 in the direction of arrow II and
• 3 the vehicle seat 1 with activated anti-immersion device.

ILLUSTRATION OF PREFERRED EMBODIMENTS

1 FIG. 1 shows a vehicle seat 1 with a seat bottom 10 and a seat back 12, which is attached by means of a conventional seat bracket 11 to an interior floor structure 13 of a vehicle. The lower seat part 10 has a seat base element 14 connected to the seat console 11 and a seat cushion 15 attached thereto in a conventional manner. The seat back 12 also has a backrest structural element 16 attached pivotably to the seat bottom element 14 and a backrest cushion 17 attached thereto.

In the seat bottom 10, an anti-immersion device 2 is provided below the seat cushion 15, which causes a lifting of the seat back 12 facing away from the front part 15 in a collision 15 'of the seat cushion 15, as in connection with 3 will be described later. The anti-immersion device 2 has a rocker element 20 which is mounted on the seat base element 14 so that it can pivot about a transverse axis y.

The rocker element 20 forms, as is also the case in 2 can be seen, with a rear bracket 21 bent in a U-shape, a rear lever area 22 located between the transverse axis y and the seat back 12 . In front of the transverse axis y in the direction of travel F, the rocker element 20 is formed by a front bracket 26 bent in a U-shape, which forms a front lever region 24 pointing from the transverse axis y to the front part 15 ′ of the seat cushion 15 .

The rear lever area 22 has a left rear lever arm 22′, which is formed by a left rear leg 21′ of the U-shaped rear bracket 21 extending backwards from the transverse axis y, and a right rear one Lever arm 22" which is formed by a right rear leg 21" of the U-shaped rear bracket 21 extending rearward from the transverse axis y.

At the rear end facing away from the transverse axis y, the respective rear leg 21', 21'' transitions into a rear cross brace 21''', which forms the base of the U-shaped rear bracket 21. On the rear cross brace 21''' is a rear pressure plate 25 attached, which is located in the in 1 and 2 shown inactive state extends substantially horizontally.

The front lever area 24 has a left front lever arm 24', which is formed by a left rear leg 26' of the U-shaped front bracket 26, which extends rearwardly from the transverse axis y, and a right rear lever arm 24'', which is formed by a is formed from the right front leg 26" of the U-shaped front bracket 26, which extends rearward from the transverse axis y.

At the front end facing away from the transverse axis y, the respective front leg 26', 26'' merges into a front cross brace 26''', which forms the base of the U-shaped front bracket 26. On the front cross brace 26''' is a attached front pressure plate 27, which is located in the in 1 and 2 shown inactive state also extends substantially horizontally.

The two rear lever arms 22', 22" of the same length are shorter than the front lever arms 24', 24" that are connected to them or formed in one piece with them and are also of the same length, the ratio of the length of the front lever arms 24', 24" being the rear lever arms 22', 22" is about 1.5 to 2.5.

3 shows the vehicle seat 1 , on which a passenger 3 is seated, who is buckled in with a safety belt 30 (only indicated schematically here). The seat belt 30 includes a diagonal shoulder belt section 32 and a lap belt section 34. The passenger 3 sits on the seat cushion 15 of the seat bottom part 10 and presses the seat cushion 15 in the rear area with his buttocks 36 in the usual way.

In the event of a frontal collision, the body of the passenger 3, especially when the seat backrest 12 is in an inclined position, tends to dive under the lap belt section 34 due to the inertial forces acting on it, with the inertial forces acting on the passenger 3 pushing the buttocks 36 of the passenger 3 deeper in push in the seat cushion 15, the forces P directed downwards pressing on the rear cross brace 21''' of the rear bracket 21 and on the pressure plate 25 provided there and moving them downwards. This creates a (in 3 ) counterclockwise moment M about the transverse axis y, which moves the front bracket 26 upwards. As a result, the front cross brace 26''' and the front pressure plate 27 provided there press from below against the front part 15' of the seat cushion 15 and lift this front part 15' together with the front part 38' of the thighs 38 of the passenger 3. The ramp formed by the seat cushion 15 and rising sharply upwards in the direction of travel F, together with the support structure formed by the front bracket 26, supports the inertial forces of the passenger 3 directed forwards in the direction of travel F, and submarining of the passenger 3 under the lap belt section 34 is prevented.

The invention is not limited to the above exemplary embodiment, which merely serves to explain the core idea of the invention in general. Rather, within the scope of protection, the device according to the invention can also assume other configurations than those described above. In this case, the device can in particular have features which represent a combination of the respective individual features of the claims.

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

Reference List

1

vehicle seat

2

Anti-immersion device

3

passenger

10

seat base

11

seat console

12

seat back

13

interior floor structure

14

seat bottom element

15

seat pad

15'

front part of the seat cushion

16

backrest structural element

17

backrest pad

20

rocker element

21

rear bracket

21'

left posterior thigh

21''

right rear thigh

22

rear lever area

22'

left rear lever arm

22''

right rear lever arm

24

front lever area

24'

left front lever arm

24''

right front lever arm

25

rear pressure plate

26

front bracket

26'

left front thigh

26''

right front thigh

26''

front cross brace

27

front pressure plate

30

seat belt

32

Sloping shoulder strap section

34

lap belt section

36

buttocks of the passenger

38

Thigh

38'

front part of the thigh

f

driving direction

M

moment

P

power

x

longitudinal direction

y

transverse axis

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 3841688 A1 [0003]
• DE 69931427 T2 [0003]
• DE 19943595 A1 [0004]

Claims (9)

Vehicle seat with a seat base (10) and a seat back (12), wherein the seat base (10) has a seat base element (14) and a seat cushion (15) arranged thereon and wherein the seat base (10) is equipped with an anti-immersion device (2 ) which, in the event of a collision, causes the front part (15') of the seat cushion (15) facing away from the seat back (12) to be raised , characterized in that the anti-immersion device (2) has a transverse axis (y ) has a rocker element (20) mounted pivotably on the seat bottom element (14), which has a rear lever region (22) provided between the transverse axis (y) and the seat backrest (12) and a lever region (22) extending from the transverse axis (y) to the front part (15') of the Seat cushion (15) facing the front lever area (24). vehicle seat claim 1 , characterized in that the rear lever area (22) has at least one rear lever arm (22', 22") extending backwards in the longitudinal direction (x) of the vehicle seat (1) from the transverse axis (y) and the front lever area (24) at least one front lever arm (24', 24") extending forwards from the transverse axis (y) in the longitudinal direction (x) of the vehicle seat (1), and that the rear lever arm (22', 22") is shorter than the front lever arm (24', 24"). vehicle seat claim 2 , characterized in that the front lever arm (24', 24") is 1.5 to 2.5 times longer than the rear lever arm (22', 22"). Vehicle seat according to one of the preceding claims, characterized in that the rocker element (20) is designed as a bracket construction which has a rear bracket (21) with a rear left leg (21') and a rear right leg (21"), each are mounted pivotably about the transverse axis (y) and which are connected to one another via at least one rear cross brace (21'''). vehicle seat claim 4 , characterized in that the at least one rear transverse strut (21''') is provided with at least one pressure plate (25) or is designed as a pressure plate. vehicle seat claim 4 or 5 , characterized in that the at least one rear crossbar (21''') or a pressure plate (25) forming or connected to the rear crossbar is located in a region of the lower seat part (10) under the seat cushion (15) in which the Support points of the seat legs of a passenger (3) sitting on the vehicle seat (1). Vehicle seat according to one of the preceding claims, characterized in that the rocker element (20) is designed as a bracket construction which has a front bracket (26) with a front left leg (26') and a front right leg (26"), each are mounted pivotably about the transverse axis (y) and which are connected to one another via at least one front cross brace (26'''). vehicle seat claim 7 , characterized in that the at least one front cross brace (26''') is provided with at least one pressure plate (27) or is designed as a pressure plate. Vehicle, in particular motor vehicle, with at least one vehicle seat (1) according to one of the preceding claims.

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