DE102010023055B4 - vehicle seat - Google Patents

Abstract

Vehicle seat (1) with a vertically adjustable seat cushion (2), comprising - a backrest (3) hinged to the seat cushion (2) with adjustable inclination, - an upper frame (4) connected to the seat cushion (2), - a Lower frame (7) connected to the upper frame (4) via at least one rear pivotable rocker (5) and at least one front pivotable rocker (6), which is displaceable in the longitudinal direction (x-direction) of the motor vehicle, - a rear lower frame bearing (8) , with which the at least one rear rocker (5) is rotatably connected, and - an inclination adjuster (17) for adjusting the inclination of the backrest (3), characterized in that - the rear rocker (5) via the lower frame bearing (8) by means of an extension (13) is extended, - a control cam (10) with a first and a second bearing point (11, 12) at the end is provided, the end of the extension (13) of the rear rocker (5) having a rotary connection with the end en first bearing point (11) of the control cam (10) forms, - the control cam (10) starting from the end first bearing point (11) is extended arcuately beyond the second bearing point (12) in the direction of the inclination adjuster (17), the second Bearing point (12) is slidably mounted on a slide track (14a) of a longitudinally extending, vehicle-fixed slide (14) and the end of the extension of the control cam (10) forms a limiting means (15) for limiting the inclination of the backrest (3), and - the slide track (14a) and the control cam (10) have such a course that when the adjustment of the seat cushion (2) relative to the upper frame (4) causes rotation of the rocker (5) about the lower frame bearing (8) and by moving of the upper frame (7) relative to the motor vehicle caused displacement of the lower frame (7) in the longitudinal direction, the control cam (10) via the end first bearing point (11) ...

Description

The invention relates to a vehicle seat with a longitudinal seat adjustment and a vertically adjustable seat cushion according to the preamble of patent claim 1.

The adjustability of vehicle seats for motor vehicles both in the longitudinal direction of the vehicle and in the horizontal and vertical directions has long been state of the art, as has the possibility of adjusting the backrest angle of the backrest of such vehicle seats.

So is out of the DE 197 46 736 A1 a generic vehicle seat known, which consists of a seat cushion and a hinged to this backrest. The seat cushion is arranged on an upper frame, on which are hinged both ends of wings of a Sitzhöhenverstellmechanismus in the region of the front edge of the seat cushion and in the region of the backrest, the other ends are pivotally mounted on a longitudinally displaceably connected to a vehicle-fixed lower rail upper rail of a seat rail ,

However, the free adjustability of the backrest inclination leads to a number of disadvantages in the motor vehicle. If, for example, the vehicle seat is adjusted to its rearmost position, there is the danger of an unreasonable restriction of the seat space for rear passengers in the case of large backrest inclination angles. Furthermore, the backrest, especially in convertible vehicles to avoid noise to avoid cladding parts. A concern of the backrest on trim parts should also be avoided for safety reasons. If a load compartment adjoins the backrest, no defined storage space can be made available due to excessively large angles of inclination, or the accessibility to a backrest net can be restricted.

The object of the invention is to provide a vehicle seat of the type mentioned, with which the mentioned disadvantages are avoided, in particular a simple way can be created to restrict the adjustability of the backrest inclination of a backrest of a vehicle seat, but without high comfort losses for the user such vehicle seat must be accepted.

This object is achieved by a vehicle seat having the features of patent claim 1.

• – eine an dem Sitzkissen angelenkte, in ihrer Neigung einstellbare Rückenlehne,
• – einen mit dem Sitzkissen verbundener Oberrahmen,
• – einen über wenigstens eine hintere schwenkbare Schwinge und wenigstens eine vordere schwenkbare Schwinge mit dem Oberrahmen verbundener Unterrahmen, der in Längsrichtung des Kraftfahrzeugs verschiebbar ist,
• – ein hinteres Unterrahmenlager, mit dem die wenigstens eine hintere Schwinge drehbar verbunden ist, und
• – einen Neigungssteller zur Neigungsverstellung der Rückenlehne umfasst, zeichnet sich erfindungsgemäß dadurch aus, dass
• – die hintere Schwinge über das Unterrahmenlager mittels einer Verlängerung verlängert ist,
• – eine Steuerkurve mit einem endseitigen ersten und einem zweiten Lagerpunkt vorgesehen ist, wobei das Ende der Verlängerung der hinteren Schwinge eine Drehverbindung mit dem endseitigen ersten Lagerpunkt der Steuerkurve bildet,
• – die Steuerkurve ausgehend von dem endseitig ersten Lagerpunkt bogenförmig über einen zweiten Lagerpunkt hinaus in Richtung des Neigungsstellers verlängert ist, wobei der zweite Lagerpunkt schiebebeweglich auf einer Kulissenbahn einer in Längsrichtung verlaufenden fahrzeugfesten Kulisse gelagert ist und das Ende der Verlängerung der Steuerkurve ein Begrenzungsmittel zur Begrenzung der Neigung der Rückenlehne bildet, und
• – die Kulissenbahn und die Steuerkurve einen derartigen Verlauf aufweisen, dass bei einer durch das Einstellen des Sitzkissens relativ zum Oberrahmen bewirkten Drehung der Schwinge um das Unterrahmenlager und durch das Verschieben des Oberrahmens relativ zum Kraftfahrzeug bewirkten Verschiebung des Unterrahmens in Längsrichtung die Steuerkurve über den endseitigen ersten Lagerpunkt und den in der Kulissenbahn geführten zweiten Lagerpunkt in eine die maximale Neigung der Rückenlehne bei Anliegen des Begrenzungsmittels an einem mit der Rückenlehne verbundenen Anschlag begrenzenden Position geführt wird, wobei in der maximaler Neigung der Rückenlehne deren rückwärtigste Kante in Längsrichtung immer die gleiche Position einnimmt.

Such a vehicle seat with a vertically adjustable seat cushion, which

• A seat backrest articulated to the seat cushion and adjustable in inclination,
• A top frame connected to the seat cushion,
• A subframe connected to the upper frame via at least one rear pivotable rocker and at least one front pivoting rocker which is displaceable in the longitudinal direction of the motor vehicle,
• - A rear subframe bearing, with which the at least one rear rocker is rotatably connected, and
• - Includes a tilt adjuster for tilt adjustment of the backrest, according to the invention is characterized in that
• The rear rocker is extended beyond the subframe bearing by means of an extension,
• A control cam having an end-side first and a second bearing point is provided, wherein the end of the extension of the rear rocker forms a rotational connection with the end-side first bearing point of the control cam,
• - The control curve is extended starting from the end side of the first bearing point arcuately over a second bearing point out in the direction of inclination actuator, wherein the second bearing point is slidably mounted on a slide track of a longitudinally fixed vehicle fixed gate and the end of the extension of the cam a limiting means for limiting the Inclination of the backrest forms, and
• - The slide track and the control cam have such a course that at a caused by adjusting the seat cushion relative to the upper frame rotation of the rocker about the lower frame bearing and by moving the upper frame relative to the motor vehicle caused displacement of the subframe in the longitudinal direction, the control cam on the end first Bearing point and guided in the slide track second bearing point is guided in a maximum inclination of the backrest in abutment of the limiting means on a connected to the backrest stop limiting position, wherein in the maximum inclination of the backrest whose rearward edge in the longitudinal direction always assumes the same position.

With this vehicle seat according to the invention, depending on the longitudinal position and depending on the vertical seat cushion position, a limitation of the backrest inclination is achieved, so that the horizontal distance of the rearmost edge of the backrest always has the same distance to a point located behind the vehicle seat in its maximum inclination.

Advantageous developments of the invention will become apparent from the dependent claims.

The invention will now be described in detail by means of an embodiment with reference to the accompanying figures. Show it:

1 a schematic representation of a vehicle seat as an embodiment of the invention in a first vehicle seat position,

2 a schematic representation of the vehicle seat according to 1 in a second vehicle seat position, and

3 a schematic representation of the vehicle seat according to 1 in a third vehicle seat position.

The in the 1 to 3 illustrated vehicle seat according to the invention 1 shows the situation in a two-seater convertible vehicle, behind the vehicle seat 1 a back wall 18 located.

The vehicle seat according to the invention 1 according to these 1 to 3 includes one with a top frame 4 connected seat cushion 2 , this upper frame 4 over front and rear wings 6 and 5 for height adjustment of the seat cushion 2 swiveling with a subframe 7 connected is. The subframe 7 is in the longitudinal direction (x-direction) of the vehicle on a seat rail 19 displaceable and thus the entire vehicle seat 1 ,

On the seat cushion 2 is a backrest 3 articulated, whose inclination by means of a tilt adjuster, in the 1 to 3 as a handwheel 17 is formed, is adjustable. Further, on the axis of the handwheel 17 a cam disc 9a arranged, not with the axle, but with the backrest 3 is firmly connected. This cam disc 9a has a cam serving as a stop 9 on. When adjusting the backrest 3 by means of the handwheel 17 this stop turns 9 on a circular path with.

In the 1 to 3 is the vehicle seat 1 shown in different Längspostionen as well as with different vertical seat cushion positions, wherein in these positions, the backrest 3 each can assume a maximum inclination angle such that the rearmost edge 16 the backrest 3 always the same horizontal distance x to the back wall 18 having. As a result, the maximum angle of inclination of the backrest 3 from the longitudinal position of the vehicle seat 1 as well as from the vertical position of the seat cushion 2 depends.

The in the 1 to 3 shown different seating positions are also apparent from the Sitzverstellfeldern V shown there.

So shows 1 a Sitzverstellfeld V with an R-point (seat reference point) P shown in its center, which is a central longitudinal position of the vehicle seat 1 as well as a middle vertical position of the seat cushion 2 , displays.

The Sitzverstellfeld V according to 2 shows a point P at which the vehicle seat 1 in terms of longitudinal adjustment, a rearward position and with respect to the seat cushion 2 the highest position.

According to the Sitzverstellfeldes V after 3 is the vehicle seat 1 again in a backward position, however, takes the seat cushion 2 its lowest position.

The following is the operation of the vehicle seat 1 which are used to limit the angle of inclination of the backrest 3 leads.

The rear swingarm 5 is on the one hand with a rear upper frame bearing 20 and on the other hand with a rear subframe storage 8th rotatably connected. This rear swingarm 5 is under education of an extension 13 over the rear subframe storage 8th extended, with the swingarm 5 and this extension 13 are integrally formed, but this extension 13 slightly bent down.

The end of the extension 13 the rear swingarm 5 forms an arcuate cam 10 a first bearing point 11 by the end of this cam 10 a rotary joint with the end of the extension 13 forms. The control curve 10 has a second bearing point 12 on, over which the control curve 10 sliding on a slide track 14a a running in the longitudinal direction (x-direction) backdrop 14 is stored. This is a sliding block 21 provided with the cam 10 is firmly connected. This will be the control curve 10 from the slide railway 14a controlled.

This control curve 10 extends over this second bearing point 12 out arcuate and forms at its end 15 a limiting means for the stop formed as a cam 9 , The backrest 3 can by means of the handwheel 17 be tilted so far until the cam 9 to the end 15 , as the limiting means of the control cam 10 abuts and thus a further rotational movement of the handwheel 17 blocked. With this blocking position results in a 1 illustrated maximum angle of inclination of the backrest 3 in which the rearmost edge 16 the backrest 3 a distance x to the rear wall 18 having. A larger angle of inclination can not be set.

Will the vehicle seat 1 moved in the longitudinal direction to the rear in its rearmost position, comes the sliding block 21 in the region of an upwardly arcuate end portion 14b , whereby the control curve 10 around her first camp point 11 is also turned up, so that thereby the end 15 the control curve 10 for the cam 9 moves in the vertical direction, as in the 2 and 3 is shown.

If, however, only the seat cushion 2 from the middle position to 1 in the vertical direction, for example. Downwardly adjusted, the rear rocker rotates 5 with the rear subframe bearing 8th as a fulcrum, causing the control curve 10 rotates accordingly, so that thereby the end of the control cam 10 So the limiting means 15 with lowers and when hitting the cam 9 at this limiting means 15 only the maximum inclination angle can be adjusted, in which the rearward distance x is maintained.

According to 2 is the seat cushion 2 of the vehicle seat shifted to a rearward position 1 in the highest position. When moving to this position, the rocker turns 5 with the extension 13 around the rear subframe bearing 8th , whereby also the control curve 10 is rotated around the same pivot so that the limiting means 15 the control curve 10 is moved upwards. Also in this position is the inclination angle through the limiting means 15 so bounded that the backmost edge 16 the backrest 3 a distance x to the rear wall 18 having.

To 3 becomes the seat cushion 2 of the vehicle seat shifted to a rearward position 1 lowered into the lowest position, which due to the triggered rotational movement of the rocker 5 around the rear subframe bearing 8th also the limiting means 15 the control curve 10 is lowered with.

The farther the vehicle seat 1 moved to the rear, the more the second bearing point moves 12 with the sliding stone 21 in the area of the arcuate section 14b the slide track 14a , causing the limiting means 15 the control curve 10 is increasingly moved upwards, ie, while maintaining the rearward distance x is the maximum with the handwheel 17 adjustable angle of inclination of the backrest 3 steeper and steeper.

The arrangement according to the invention with the control cam 10 and the backdrop that interacts with it 14 and rear swingarm 5 First, perform a height and length adjustment before the backrest inclination by means of the handwheel 17 is adjustable.

LIST OF REFERENCE NUMBERS

1

vehicle seat

2

seat cushions

3

backrest

4

Upper frame of the vehicle seat 1

5

rear swingarm

6

front swingarm

7

Subframe of the vehicle seat 1

8th

rear subframe storage

9

Stop, cam

9a

cam

10

cam

11

first bearing point of the control cam 10

12

second bearing point of the cam 10

13

Extension of the rear swingarm 5

14

scenery

14a

Sliding gate of the backdrop 14

14b

arcuate section of the backdrop 14

15

End of the control curve 10 , Limiting means

16

rearmost edge of the backrest 3

17

Tilt adjuster, handwheel

18

rear wall

19

seat rail

20

rear upper frame bearing

21

sliding block

Claims (4)

Vehicle seat ( 1 ) with a vertically adjustable seat cushion ( 2 ), comprising - one on the seat cushion ( 2 ) hinged, adjustable in its inclination backrest ( 3 ), - one with the seat cushion ( 2 ) connected upper frame ( 4 ), - one via at least one rear pivoting rocker ( 5 ) and at least one front pivoting rocker ( 6 ) with the upper frame ( 4 ) associated subframe ( 7 ) which is displaceable in the longitudinal direction (x-direction) of the motor vehicle, - a rear subframe bearing ( 8th ), with which the at least one rear rocker ( 5 ) is rotatably connected, and - a tilt actuator ( 17 ) for tilt adjustment of the backrest ( 3 ), characterized in that - the rear rocker ( 5 ) via the subframe bearing ( 8th ) by means of an extension ( 13 ), - a control cam ( 10 ) having an end-side first and a second bearing point ( 11 . 12 ), the end of the extension ( 13 ) of the rear rocker ( 5 ) a rotary connection with the end-side first bearing point ( 11 ) of the control cam ( 10 ), - the control cam ( 10 ) starting from the end first bearing point ( 11 ) arcuately over the second bearing point ( 12 ) out in the direction of the tilt actuator ( 17 ), the second bearing point ( 12 ) sliding on a slide track ( 14a ) a longitudinally fixed vehicle-fixed scenery ( 14 ) and the end of the extension of the control cam ( 10 ) a limiting means ( 15 ) for limiting the inclination of the backrest ( 3 ), and - the slide track ( 14a ) and the control cam ( 10 ) have such a course that at a by adjusting the seat cushion ( 2 ) relative to the upper frame ( 4 ) caused rotation of the rocker ( 5 ) around the subframe ( 8th ) and by moving the upper frame ( 7 ) relative to the motor vehicle caused displacement of the subframe ( 7 ) in the longitudinal direction of the control cam ( 10 ) over the end-side first bearing point ( 11 ) and the in the slide track ( 14a ) second bearing point ( 12 ) in a the maximum inclination of the backrest ( 3 ) in the case of the limitation means ( 15 ) on one with the backrest ( 3 ) associated stop ( 9 ) limiting position, wherein in the maximum inclination of the backrest ( 3 ) whose rearmost edge ( 16 ) always takes the same position in the longitudinal direction. Vehicle seat according to claim 1 or 2, characterized in that the stop as a cam ( 9 ) is formed, said cam ( 9 ) for limiting the backrest inclination to the limiting means ( 15 ) of the control cam ( 10 ) strikes. Vehicle seat according to claim 2, characterized in that a cam disc ( 9a ) with a cam ( 9 ) is provided as a stop, wherein the cam disc ( 9a ) with the backrest ( 3 ) connected is. Vehicle seat according to one of the preceding claims, characterized in that the scenery ( 14 ) extends in the longitudinal direction and the rear end in an arcuate portion ( 14b ) ends.

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