DE102007032524A1 - Vehicle i.e. passenger car, seat, has back rest attached with rotary damping mechanism or irreversible deformation structure, and shoulder belt attached at backrest in upper region to safeguard passenger - Google Patents

Abstract

The seat (5) has front and back levers (6, 7) staying in flexible connection with a seat frame. A back rest (1) is attached with a rotary damping mechanism (11) or an irreversible deformation structure such that the backrest is adjusted from a resting position by an active inertial force in a crash-fall independent of a front-crash or rear-crash depending on relative inertia of the seat i.e. passenger seat. The passenger is safeguarded by a shoulder belt (22) attached at the backrest along an upper region such that the passenger is brought into a sitting position.

Description

The The invention relates to a vehicle seat with a tilt-adjustable Backrest, in particular for passenger cars, with the features mentioned in the preamble of claim 1.

It is known, in the case of vehicle seats, the principle of a tilt-adjustable Backrest in principle for all common passenger cars, especially in the front seats to use. Today's motor vehicles with possibility of reclining generally leave a strong inclination of the backrest, being always in appropriate manner (operating instructions) is pointed out that for driving due to safety reasons in principle an upright posture is to take.

Should In contrast, for the occupant while driving a resting position This requires that specially adapted or additional safety devices for this case would have to be provided.

Out EP 1 048 509 A2 a vehicle seat is known in which starting from a relative to a backrest lower part pivotally arranged back upper part of this pivots forward in the event of a crash. This results in the neck and head area of the seat occupant coming into contact with the backrest upper part or the head restraint mounted thereon, so that the seat occupant may be better protected against injuries, for example the so-called cervical spine syndrome.

According to the DE 198 28 255 C2 Furthermore, a vehicle seat is known by which the seat occupant is to be protected in the rest position against the so-called submarining. In this case, this vehicle seat goes from a seat cushion to the erectable backrest and a restraint device for the seat occupant, which has a three-point safety belt and an additional belt that can be tensioned over the chest of the seat occupant to a second buckle and as Schrägschultergurt starting from the upper edge of the backrest runs to the floor mounted second buckle. For the guidance of the additional belt over the chest of the seat occupant different variants are provided, of which, for example, a guide provides a course of the additional belt, which lies between the upper edge of the backrest and the region of the seat cushion of the vehicle seat on the side facing away from the vehicle wall. In this vehicle seat whose seat cushion is displaceable in the vehicle longitudinal direction and held in its inclination to the vehicle floor adjustable on the vehicle floor. For this purpose, on the one hand in the vehicle longitudinal direction extending guide rails and the other height adjustment means in the form of existing knee levers kinematics are provided so that the seat cushion is moved in the rest position in the direction of travel in a front, predetermined position and inclined back.

Of the Invention is based on the object, a vehicle seat with a reclining backrest, especially for Passenger cars, according to the preamble of claim 1 to create by the without sensors and actuators starting from a strongly inclined backrest and therefore of the intake a position of the vehicle seat in the rest position not only in a front crash, but also in a rear-end crash the risk of injury of the vehicle occupant located on the vehicle seat further reduced becomes.

Thereby, that according to the invention, the kinematics of two front and two rear, on the seat frame articulated levers exists with both the seat frame and indirectly or directly hinged to the vehicle floor via a respective pivot point communicate, and that the backrest is a rotatory Damping mechanism or irreversible deformation structure is assigned such that in a crash case depending from the respective inertia of the vehicle seat, in particular of the vehicle seat using, also on the s.der Backrest in its upper area attached shoulder strap secured vehicle occupants, the backrest through the acting mass forces from the assumed resting position steamed is set up and the vehicle occupant in a essentially upright seating position can be brought, is a vehicle seat provided with an inertia-actuated mechanism, by starting from a strongly inclined backrest and Thus, from taking a position of the vehicle seat in the Rest position in a front crash, a so-called submarining and in a rear crash, a ramp-up effect by installation the backrest by the mass forces acting on it counteracted and thus the risk of injury of the on the Vehicle seat occupants may be could be reduced.

In a preferred embodiment of the invention while the backrest on its rear side facing a simultaneously pivot point for the backrest forming breakpoint is assigned, which preferably consists of a built-in backrest pin, which extends over a longitudinally directed on the backrest side arranged in the upper portion of a bushing in this engages firmly with one of the components of the vehicle body ver is bound. If a frontal crash occurs due to the collision of the passenger vehicle with an obstacle, the delayed vehicle occupant causes the backrest to be set up via the shoulder strap fastened to the backrest. In this setting up the backrest latches with increasing force, the backrest on the longitudinally extending cutout with its pin from the socket and thus from the breakpoint.

In Advantageous embodiment of the invention, this has a damping mechanism, which expediently the energy of the rotary Movement of the seat back absorbed. This damping can over a suitable mechanical coupling and translation of Rotary movement through all known physical damping mechanisms respectively. For example, hydraulic and pneumatic shock absorbers, Surface or fluid friction, damper elements in viscous liquids, electromagnetic eddy current brakes, plastic Deformation elements etc.

Becomes in the inventively designed vehicle seat Consider a frontal crash, so take in the resting position the vehicle seat and thus with strongly inclined backrest as well as in the case of a front crash and the resulting Erecting the backrest, what with the notching of the in the backrest integrated pin from the socket the holding point is connected, the two front, articulated Lever of kinematics a position in which they are under a relative small angles are tilted backwards while the two rear, hinged lever in its assumed position are arranged substantially vertically. Done under Consider this position of the front and rear on the seat frame hinged lever a front crash, so is the backrest and thus the over on the Backrest secured shoulder strap secured vehicle occupant under the action of the rotary damping mechanism, in particular of the hydraulic system, delayed erectable or erectile.

After all the kinematics of the seat frame is designed such that the momentary-Drehpol the backrest in a rear-crash, in which the vehicle occupant pushes the seat part backwards, wherein the backrest straightens up, essentially located near the head. The acceleration forces caused by the rotation could thereby be reduced and the risk of injury reduced become.

Becomes Consider a rear-end crash, so take in the vehicle seat according to the invention in the rest position of the vehicle seat and thus with strongly inclined backrest, the two front, articulated Although arranged kinematics lever also again a position one in which they are at a relatively small angle to the rear inclined and also the two rear, articulated levers are again arranged running in the vertical direction, but starting from this course of the arrangement of levers in the resting position at a rear-end crash both the front and the two Rear, hinged lever a position in which they tilted backwards at a larger angle are.

Further preferred embodiments of the invention will become apparent from the others, in the subclaims mentioned features.

The Invention will become apparent from an embodiment explained with reference to the accompanying drawings. Show it:

1 a schematic view of a vehicle seat with a reclining backrest in the rest position;

2 a vehicle seat with the reclining backrest 1 after a front crash and

3 a vehicle seat with the reclining backrest 1 after a rear crash.

The 1 shows a substantially of a reclining backrest 1 , a seat part 2 , a seat frame 3 as well as from a kinematics 4 existing vehicle seat 5 , This is the kinematics 4 from two front and two rear, hinged levers 6 . 7 , These are each about a pivot point 8th . 9 both with the seat frame 3 as well as with the vehicle floor 10 articulated. The kinematics 4 is a rotary damping mechanism 11 - Here symbolically represented by an annular hydraulic - associated with its damping elements 12 . 23 are formed in a circular arc and the piston rod 13 with the backrest 1 connected is. This also has a breakpoint 14 , a pivot point 15 for the backrest 1 forms. The breakpoint 14 consists of one in the backrest 1 integrated pin 16 , which runs along a longitudinal direction, on the backrest 1 dressed side in the upper area arranged cutout 17 a socket 18 engages in these. Here is the socket 18 firmly with one of the components 19 connected to the vehicle body. Starting from the apparent from this figure rest position of the vehicle seat 5 in which the backrest 1 relatively strongly inclined backwards, take in this rest position, the two front, articulated lever 6 the kinematics 4 a position in which they are inclined at a relatively small angle to the rear. In contrast, the two rear, articulated levers take this rest position 7 a position in which they run in the vertical direction. This figure also shows that on the vehicle seat 5 placed vehicle occupant by a restraint device 20 is secured, which is designed as a three-point safety belt, wherein the upper fixed point of the shoulder belt 22 not attached to the vehicle frame, but at the top of the seat back.

It starts from this one 1 apparent, through the backrest 1 assumed resting position a front crash, so takes the backrest 1 after the front crash the out 2 prominent position. Assuming that on the vehicle seat 5 placed vehicle occupant due to the on the backrest 1 fastened shoulder strap practically forms a unit, made by the resulting, on the backrest 1 acting mass forces in a frontal crash a list of the backrest 1 , so that in this front-crash a so-called submarining, in which the vehicle occupant under the lap belt 21 can dive through, is counteracted. But from this figure also shows that the erection of the backrest 1 in which the in the backrest 1 integrated cones 16 from the socket 18 of the breakpoint 14 notches, through which on the backrest 1 acting mass forces due to the assignment of the damping mechanism 11 attenuated, as from the assumed position of the damping elements 12 . 23 evident. The erection of the backrest 1 takes place in a front crash without changing the position of the seat part 2 opposite to the 1 Resulting, occupied in the rest position position, so that the two front, articulated levers 6 the kinematics 4 as well as the two rear, articulated levers 7 maintain their position.

After a rear-end crash, the backrest picks up 1 of the vehicle seat 5 from 3 apparent position in which they are opposite to the 1 apparent resting position is easily set up. As is apparent from this figure, in a rear-end crash of the seat part 2 of the vehicle seat 5 pressed by the vehicle occupant to the rear, in which case the backrest 1 sets up accordingly. Again, the erection of the backrest is done 1 due to the assignment of the damping mechanism 11 attenuated. Compared to a front crash latches in a rear-crash in the backrest 1 integrated cones 16 However, do not get stuck with one of the components 19 the vehicle body connected socket 18 of the breakpoint 14 out. In connection with the training of kinematics 4 of the seat frame 3 of the vehicle seat 5 forms the fulcrum 15 of the breakpoint 14 rather, a pivot pole for the backrest 1 , Such that in a rear-end crash, the instantaneous Drehpol the backrest 1 essentially always located in the region of the head of the vehicle occupant. The acceleration forces caused by the rotation of the backrest could thereby be reduced and the risk of injury reduced. Is the installation of the backrest 1 completed after a rear crash, so are both the two front, articulated levers 6 the kinematics 4 as well as their two rear, articulated levers 7 towards the rest position after 1 tilted backwards at a larger angle.

1

backrest

2

seat part

3

seat frame

4

kinematics

5

vehicle seat

6

supple arranged lever

7

supple arranged lever

8th

fulcrums

9

fulcrums

10

vehicle floor

11

rotatory damping mechanism

13

piston rod

14

halt

15

fulcrums

16

spigot

17

neckline

18

Rifle

19

components the vehicle body

20

Restraint

21

lap

22

shoulder

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1048509 A2 [0004]
• - DE 19828255 C2 [0005]

Claims (8)

Vehicle seat with a tilt-adjustable backrest, in particular for passenger cars, in which the seat part ( 2 ) receiving seat frame ( 3 ) via a kinematics consisting of levers ( 4 ) with the vehicle floor ( 10 ) and that on the vehicle seat ( 5 ) placed by a restraint device ( 20 ), not only from a lap belt ( 21 ), but also from a shoulder strap ( 22 ), on the one hand in the area of the seat frame ( 3 ) and on the other hand on the backrest ( 1 ), characterized in that the kinematics ( 4 ) from two front and two rear, on the seat frame ( 3 ) articulated levers ( 6 . 7 ), which fits both with the seat frame ( 3 ) as well as indirectly or directly with the vehicle floor ( 10 ) each have a pivot point ( 8th . 9 ) and that the backrest ( 1 ) a rotary damping mechanism ( 11 ) or an irreversible deformation structure is assigned such that in a crash case, regardless of a front crash or a rear crash depending on the respective inertia of the vehicle seat ( 5 ), in particular of the vehicle seat ( 5 ), also on the backrest ( 1 ) in its upper region attached shoulder strap ( 22 ) secured vehicle occupants, the backrest ( 1 ) is damped by the acting mass forces from the occupied rest position and the vehicle occupant can be brought into a substantially upright sitting position. Vehicle seat according to claim 1, characterized in that the backrest ( 1 ) on its rear-facing side an equilateral fulcrum ( 15 ) for the backrest ( 1 ) forming breakpoint ( 14 ), which preferably consists of one in the backrest ( 1 ) integrated pin ( 16 ) extending over a longitudinal direction on which the backrest ( 1 ) aligned side in the upper area arranged cutout ( 17 ) a socket ( 18 ) interfering with them, which are fixed to one of the components ( 19 ) of the vehicle body is connected. Vehicle seat according to claim 2, characterized in that when setting up the backrest ( 1 ) in a frontal crash with increasing force the backrest ( 1 ) over the longitudinally extending cutout ( 17 ) of the socket ( 18 ) Is unlatched from this. Vehicle seat according to claim 3, characterized in that the rotary damping mechanism ( 11 ) is a pneumatic system. Vehicle seat according to one of the preceding claims, characterized in that both in the rest position of the vehicle seat ( 5 ) and thus with a strongly inclined backrest ( 1 ) as well as during a front crash and the resulting erection of the backrest ( 1 ) the two front articulated levers ( 6 ) of kinematics ( 4 ) assume a position in which they are inclined at a relatively small angle to the rear, while the two rear, articulated lever ( 7 ) are arranged in their assumed position substantially vertically. Vehicle seat according to claim 5, characterized in that in a front crash the backrest ( 1 ) and thus the over the on the backrest ( 1 ) attached shoulder strap ( 22 ) secured vehicle occupant under the action of the rotary damping mechanism ( 11 ), in particular of the hydraulic system, can be erected or erected with a delay. Vehicle seat according to one of the preceding claims, characterized in that the kinematics ( 4 ) of the seat frame ( 3 ) is formed such that the instantaneous Drehpol the backrest ( 1 ), which is in the fulcrum ( 15 ) of the breakpoint ( 14 ) of the backrest ( 1 ) is located in a rear crash substantially in the region of the head of the vehicle occupant and the cervical spine. Vehicle seat according to claim 7, characterized in that in the rest position of the vehicle seat ( 5 ) and thus with a strongly inclined backrest ( 1 ) the two front articulated levers ( 6 ) of kinematics ( 4 ) assume a position in which they are inclined at a relatively small angle to the rear, while the two rear, articulated lever ( 7 ) occupy a position in which they are arranged to extend in the vertical direction, and that starting from this course of the arrangement of the lever ( 6 . 7 ) in the rest position in a rear crash both the front and the two rear, articulated levers ( 6 . 7 ) assume a position in which they are inclined at a larger angle to the rear.