EP3204257A1

EP3204257A1 - Adjustment device for a rear seat bench, and a seat arrangement

Info

Publication number: EP3204257A1
Application number: EP15775237.9A
Authority: EP
Inventors: Wolfgang Pluta; Christian Wolf; Heinrich Hammann
Original assignee: Adient Luxembourg Holding SARL
Current assignee: Adient Luxembourg Holding SARL
Priority date: 2014-10-08
Filing date: 2015-10-08
Publication date: 2017-08-16
Also published as: DE102014220405B4; DE102014220405A1; CN106794784A; WO2016055563A1; US20180236906A1; CN106794784B

Abstract

Adjustment device for a rear seat bench, and a seat arrangement. The invention relates to an adjustment device (1) for a rear seat bench (2), comprising a seat part (3) and a divided backrest (4) that has at least one car body-side rest segment (4.1) and at least one adjacent rest segment (4.2), at least one of these rest segments (4.1, 4.2) being foldable from a use position into a non-use position, or vice versa, when in the unlocked state. According to the invention, a spring unit (7) is arranged between the adjacent rest segments (4.1, 4.2) and is functionally connected to said rest segments (4.1, 4.2) in a mechanical manner. The invention also relates to a seat arrangement comprising such an adjustment device (1).

Description

Adjustment device for a rear seat and seat arrangement Description

The invention relates to an adjusting device for a rear seat, comprising a seat part and a split backrest with at least one body-side backrest segment and at least one adjacent backrest segment, wherein at least one of the backrest segments in

Unlocked state of a use position in one

Non-use position or vice versa is hinged.

Furthermore, the invention relates to a seat assembly for a vehicle comprising such an adjustment device for a rear seat.

Regarding the prior art, adjusting devices for rear seat benches are known which comprise the seat part and the split backrest. In order to adjust the backrest segments of the backrest, locking units and so-called Lehnenkompensationsfedern are provided, each with a Lehnenkompensationsfeder for

Backrest segment is provided. A backrest compensation spring serves to at least partially compensate for a weight of the backrest during folding.

Object of the present invention is to provide a comparison with the prior art improved adjustment device for a rear seat and an improved seat assembly.

With regard to the adjusting device, the object is achieved by the claim 1 and in terms of the seat assembly by the features specified in claim 10. Advantageous embodiments of the invention are the subject of

Dependent claims.

The adjusting device for a rear bench seat comprises a seat part and a split backrest with at least one in particular body-side or free-standing and undermined backrest segment and at least one adjacent backrest segment, wherein at least one of

Backrest segments in the unlocked state of a use position in a non-use position or vice versa is hinged.

According to the invention, a spring unit is arranged between the adjacent backrest segments which is in a mechanical operative relationship with these backrest segments.

The advantages achieved by the invention are in particular that compared to the prior art, only one spring unit is in operative connection with two adjacent backrest segments. This results in a component savings by saving a conventional in the art second spring unit, a weight reduction and a significant cost savings.

In a further development of the adjusting device according to the invention, the spring unit is in a locked state of the adjacent backrest segments in the latter by means of the mechanical operative connection

Pre-biased position of use, so that a spring force resulting from this bias in unlocking at least one

Lehnensegment this expels from a locking area. This ensures that, after the at least one backrest segment was driven out of the lock after unlocking, a user

Do not continue to operate unlocking to grasp the at least one backrest segment and fold further. In another embodiment of the adjusting device according to the invention, the spring unit relaxes when unlocking the adjacent

Lehnensegments from the use position such that the unlocked adjacent backrest segment relative to the body-side backrest segment, which remains locked moves. Preferably, the adjacent backrest segment is a through-loading. Thus, it is possible for the user to fold the passage separately, using the

Relaxing the spring unit is supported a folding in a specific swivel range. Depending on the dimensions and / or materials used of the spring unit, it is possible to adjust the bias so that it acts over the entire pivoting range of the adjacent backrest segment and causes a complete folding of the adjacent backrest segment, without the user

supportive intervenes.

An embodiment of the adjustment device according to the invention provides that the spring unit when unlocking the body side

Lehnensegments from the use position so relaxed that move both backrest segments.

Preferably, both backrest segments move only by one

Pivoting range to a substantially vertical position, because after exceeding this position during the pivoting movement in the

Non-use position, the spring unit is stretched in an opposite direction again.

The adjacent backrest segment is locked by means of a locking unit in the body-side backrest segment, whereby they are firmly connected to each other. The spring unit exerts on the adjacent backrest segment of the bias, which by means of

Transfer lock unit to the body-side backrest segment becomes. If the body-side backrest segment unlocked, the bias thus acts on both backrest segments alike, causing them to be expelled from the body-side locking area.

The user is thus supported when folding the backrest segments and due to the spring force is a falling back of the backrest segments in the body-side locking prevented. To lock the

To realize backrest segments in the body-side locking, the user must apply a force which counteracts a spring force.

According to a further embodiment of the invention

Adjustment device is the spring unit by means of the mechanical

Wirkzusammenhangs biased in a locked state of the body-side backrest segment in the non-use position.

The spring unit can be tensioned in two directions and has a zero crossing in a spring force curve over a defined range of angular rotation. Thus, it is possible for the user when folding the backrest segments in the position of use and in the

To support non-use position.

The body-side backrest segment is in the locked position of use, it is possible, the adjacent backrest segment in the unlocked state between position of use and

To relocate non-use position. Is this body side

Backrest segment, however, unlocked on the body side, is due to the

Locking unit between the backrest segments a pivot angle of the adjacent backrest segment depending on a position of the body-side backrest segment limited such that the adjacent Backrest segment is pivotable only between the non-use position and a position of the body-side backrest segment.

Is the body-side backrest segment in the

Non-use position, there is always the neighboring

Backrest segment in the non-use position, wherein the

Locking unit both Lehnensegmente locked together and a fitting which is arranged on the body-side backrest segment, the body-side backrest segment and thus the adjacent

Backrest segment locked in non-use position.

Advantageously, it is possible by a prestressed spring unit by means of the mechanical effect context, the folding up of at least the body-side backrest segment of the

To support non-use position after unlocking the fitting.

Another embodiment of the adjusting device according to the invention provides that the adjacent backrest segments each have a driver on which the spring unit for producing the

Interference or intervention is intervening.

If the spring unit is tensioned by at least one driver, for example during a pivoting movement of the body-side

Backrest segment in the non-use position, at least one

Driver contact with the spring unit ago, ie the driver engages the spring unit. Relaxes the spring unit, this attacks on the at least one driver. By means of the driver is the intervention of the backrest segments in the

Fed unit and an associated context of action implemented in a simple and cost-effective manner.

In another development of the adjustment device according to the invention, the spring unit is a tensionable in two directions coil spring. The coil spring is a newly wound spiral spring, which is intended to receive a torque load of the backrest segments and store or deliver as a spring force. Thus, it is possible due to small dimensions of a coil spring in an advantageous manner to ensure a compact design of the spring unit. By means of the

angled spring end which can be brought into engagement with the drivers, a simple and cost-effective torque transmission from the backrest segments on the spring unit and vice versa is realized.

The spring unit thus causes a support of erecting at least one backrest segment from the position of use for

Zero crossing of the spring force or from the non-use position to the zero crossing.

In one embodiment of the adjusting device according to the invention, the body-side driver, which on the body side

Lehnensegment is arranged on a spring-side end two opposite engaging in the spring unit stops. The first stop contacts the spring unit during a pivoting movement from the use position to the non-use position, so that it tensions the spring unit in a first direction. The second stop contacts the spring unit during a pivoting movement of the

Non-use position in the use position, so that this the spring unit in a second direction, opposite to the first direction, stressed. In the swivel range, in which the spring unit identifies the zero crossing, neither of the two stops contacts the spring unit.

In other words, the two stops forming a game are spaced apart. The spring unit runs in the region of a reversal from the used to the non-use position or vice versa against the stops.

The game limits the travel of the spring unit. The reduction of the working distance of the spring unit increases its overall service life and offers the possibility of improved spring characteristics and their selection.

For example, with a spring unit with a steep characteristic curve, a travel of 40 ° might result in too high an end torque. By skillful choice of the game or freewheel can be intervened within limits, for example, only an actual working path of 30 is realized by a 10 ° game and an optimized spring characteristic is designed.

This is particularly important when the spring unit is operated in two directions for different requirements or applications. In this case, for example, the first requirement, in which the spring unit acts forward, would be a comfort support

Adjusting the backrest. The second requirement, in which the spring unit acts backwards, would be a lifting out of the spring unit from a locked position, in particular from a lock in one

Cargo floor position. Otherwise, the resulting force would be in the

Loading floor too high, one would give the spring unit at a given

Store the loading floor angle free of play via its working path. The body-side driver is in the direction of the spring unit in the

Essentially formed horizontal U-shaped, wherein the two opposite stops are formed in the interior of the U-shape. By forming the body-side driver with a first stop and an opposite second stop, between which the angled spring end is arranged, is a simple

Torque transmission possible, with a production cost of the body-side driver, in particular the first stop and the second stop, is very low.

In another embodiment of the adjustment device according to the invention, the adjacent driver, which on the adjacent

Lehnensegment is arranged on a spring-side end to a third stop, so that the adjacent driver, the spring unit during the pivoting movements of the adjacent backrest segment from the non-use position into the use position, while the body-side backrest segment remains locked on the body tensioned. Thus, a simple torque transmission is possible. In particular, thus, the bias of the spring unit can be ensured in the position of use of the two backrest segments.

The seat arrangement for a vehicle, comprising an adjusting device according to the invention for a rear seat, offers the advantage of being smaller than the space of the prior art

Rear seat to realize and to achieve a significant component savings.

Embodiments of the invention will be explained in more detail with reference to drawings. Showing: 1 shows schematically a front view of a detail of a rear seat,

FIG. 2 schematically shows a perspective view of a spring unit in a first state,

FIG. 3 schematically shows a side view of that shown in FIG

Spring unit,

FIG. 4 schematically shows the perspective view of the spring unit in a second state,

FIG. 5 schematically shows the side view of that shown in FIG

Spring unit,

FIG. 6 schematically shows the side view of that shown in FIG

Spring unit and a section of a backrest and

Figure 7 schematically shows the side view of the spring unit in a third state.

Corresponding parts are provided in all figures with the same reference numerals.

1 shows in an embodiment of the adjusting device 1 according to the invention for a rear seat 2 a section of a front view of the rear seat 2, comprising a seat part 3 and a backrest. 4

The backrest 4 comprises a backrest segment 4.1 and an adjacent backrest segment 4.2, here a through-loading. The backrest segment 4.1 can For example, be attached to the body side, on Fahrzeugbden or on the C-pillar. Alternatively, the backrest segment 4.1, for example, on the underside of a longitudinal and / or höhenverschieblichen

Seat base be attached and locked and thus be free-standing. The backrest segments 4.1, 4.2 are divided transversely in a y-direction in a ratio of 20:40. The backrest 4 is pivotable about an axis of rotation D from a substantially vertical position of use, for example a normal sitting position, into a substantially horizontal or lying non-use position, for example a fold-over-enlarging folded-over position.

By means of a locking unit 5 is the adjacent

Lehnensegment 4.2 in the body-side backrest segment 4.1 locked, thus a positional fixation is ensured in the position of use for the adjacent backrest segment 4.2, provided that the body-side backrest segment is locked in the use position. By means of a fitting 6, which is arranged on the body side of the axis of rotation D, is a body-side locking of the

body-side backrest segment 4.1 in the use position and in the non-use position possible.

There are different states of flipping the

Backrest segments 4.1, 4.2 ingestible.

Is the body-side backrest segment 4.1 in the

Use position, the adjacent backrest segment is 4.2 in an unlocked state regardless of the body-side

Lehnensegment 4.1 from the use position in the

Non-use position and vice versa foldable. The folding of the body-side backrest segment 4.1 of the use position in the non-use position has due to an intervention of the locking unit 5 always a folding over of the adjacent backrest segment 4.2 result.

The folding over of the adjacent backrest segment 4.2 of the

Non-use position in the use position is not possible when the body-side backrest segment 4.1 is positioned in the non-use position, since due to the locking unit 5, the body-side backrest segment 4.1 forms a pivot-limiting stop for the adjacent backrest segment 4.2. However, a separate folding of the body-side backrest segment 4.1 from the non-use position to the use position is possible when the locking unit 5 is unlocked and the adjacent backrest segment 4.2 in the

Non-use position remains.

Figure 2 shows a perspective view of a spring unit 7 in a first state, wherein the body-side backrest segment 4.1 a U-shaped body-side driver 4.1 .1 and the adjacent backrest segment 4.2 a one-armed trained

adjacent driver 4.2.1 includes.

The spring unit 7 is made in the illustrated embodiment, a so-called coil spring with a torque load and a just meandering spring steel strip with approximately rectangular cross-section and designed as Lehnenkompensationsfeder, which at least partially compensates for the weight of the backrest segments 4.1, 4.2 in the possible positions of the backrest 4.

Alternatively, it is possible to provide the spring unit 7 as a torsion spring or as another suitable spring type. The spring unit 7 can be tensioned in two directions and, in a spring force course over a defined range of angular rotation, has a zero crossing at which a spring force is neither released nor absorbed.

An inner end of the spring unit 7 is supported on the vehicle floor side by means of a vehicle-fixed holding element, not shown, on the vehicle floor, wherein, for example, the inner end is suspended in a slot of the holding element. For example, the inner end of the spring unit 7 between the two backrest segments 4.1, 4.2 on one of the bottom-fixed fitting parts of the fittings of

Lehnensegmente 4.1, 4.2 connected to the vehicle floor and attached to this rotation.

An outer spring end 7.1 of the spring unit 7 is formed angled such that the spring unit 7 with the drivers 4.1 .1, 4.2.1 is operatively connected or can be brought.

The body-side driver 4.1 .1 is formed substantially horizontally U-shaped and has on the inner sides of the U-shape a first stop 4.1 .2 and an opposite second stop 4.1 .3, which between the stops 4.1 .2, 4.1. 3 arranged

Contact spring end 7.1 during pivoting of the adjacent backrest segment 4.2 and thus tension the spring unit 7 during the pivoting movement of the adjacent backrest segment 4.2 of the use position in the non-use position and vice versa.

The two stops are 4.1 .2, 4.1 .3 spaced from each other to form a game SP. As a result, the spring unit 7 runs in the region of a reversal from the used to the inoperative Position or vice versa against the stops 4.1 .2, 4.1 .3, wherein the game SP reduces the working path of the spring unit 7.

In the exemplary embodiment, the spring unit 7 acts for a first

Application forward to provide comfort support when adjusting the backrest segment 4.2. In a second application, the spring unit 7 acts to the rear to allow lifting of the spring unit 7 from a locked position, in particular from a lock in a loading floor position.

The adjacent driver 4.2.1 has a third end on a spring-side end, which is essentially designed as one arm

Stop 4.2.2, so that it engages the spring end 7.1 and the spring unit 7 during a pivoting movement of the adjacent backrest segment 4.2 from the non-use position in the

Use position clamps.

In the illustrated state of the adjustment device 1 are the

Lehnensegmente 4.1, 4.2 arranged in the position of use, wherein the third stop 4.2.2 of the adjacent driver 4.1 .1 the

Spring end 7.1 and thus biases the spring unit 7. This bias supports an unlocking of the adjacent

Lehnensegments 4.2, as the bias of the adjacent

Lehnensegment 4.2 from the locking unit 5 drives and thus simplifies a user folding into the non-use position.

FIG. 3 shows a side view of the spring unit 7 shown in FIG.

Figure 4 shows a perspective view of the spring unit 7 in a second state, wherein the locking unit 5, not shown, is unlocked and the adjacent backrest segment 4.2 due to the in Figure 2 described bias from the locking unit 5 has been driven, so that the adjacent backrest segment is 4.2 foldable from the use position in the non-use position. The body-side backrest segment 4.1 is locked in the use position body side.

The spring unit 7 is relaxed by an amount of the described bias, with a further relaxation by means of a

Supporting the spring end 7.1 is blocked at the second stop 4.1 .3 of the body-side driver 4.1 .1, since the body-side backrest segment 4.1 body side by means of the not shown

Fog 6 is locked.

FIG. 5 shows a side view of the spring unit 7 shown in FIG.

FIG. 6 shows the side view of the spring unit 7 shown in FIG. 4 and a section of the backrest 4. A first line L1 shows schematically the position of the unlocked adjacent one described in FIG

Lehnensegments 4.2, which due to the bias of the

Locking unit 5 was driven. Here, the bias drives the adjacent backrest segment 4.2 at an angle of 5 ° from the

Use position.

A second line L2 schematically shows the position of the body-side backrest segment 4.1 in the position of use, which is locked on the body side by means of the fitting 6. The spring unit 7 can, depending on dimensions and requirements, continue to exert a further bias on the body-side driver 4.1 .1 and thus the user after unlocking the body-side locking of the

body-side backrest 4.1 support, as the

body-side backrest segment 4.1 is at least partially erected. Figure 7 shows a side view of the spring unit 7 in a third state, in which the body-side locking is unlocked and the backrest segments 4.1, 4.2 are in the non-use position.

To assist in folding up the backrest segments 4.1, 4.2 for the user from the non-use position into the use position, it is provided that during the pivoting movement of the spring force curve has the zero crossing. Ie. the spring unit 7 is in the

Pivoting movement from the position of use in the

Non-use position by, for example, an angle of 20 ° by means of the engagement of the spring end 7.1 to the first stop 4.1 .2 relaxed until it is completely relaxed and has the zero crossing of the spring force.

Thereafter, the spring unit during further pivoting, for example by 10 °, the zero crossing, in which the spring unit 7 remains substantially relaxed and no engagement between the spring end 7.1 and the stops 4.1 .2, 4.1 .3 prevails. Subsequently, the

Spring unit 7 by the further pivotal movement of the body-side backrest segment 4.1 in the non-use position by means of the engagement of the second stop 4.1 .3 stretched at the spring end 7.1. This clamping requires a force of the user by pressing the body-side backrest segment 4.1 down. Is this body side

Lehnensegment 4.1 locked by means of the fitting 6 in the non-use position, the spring unit 7 exercises by means of the spring end 7.1 a

Preload on the second stop 4.1 .2, which in the

Unlocking the body-side backrest segment 4.1 a

supporting effect for the user when folding up. LIST OF REFERENCE NUMBERS

1 adjustment device

2 rear seat

3 seat part

4 backrest

4.1 Body-side backrest segment

4.1 .1 Body-side driver

4.1 .2 First stop

4.1 .3 Second stop

4.2 Adjacent backrest segment

4.2.1 Adjacent driver

4.2.2 Third stop

5 locking unit

6 fitting

7 spring unit

7.1 spring end

D rotation axis

L1 first line

L2 second line

SP game

Claims

claims

1 . Adjustment device (1) for a rear seat (2), comprising

Seat part (3) and a split backrest (4) with at least one backrest segment (4.1) and at least one adjacent

Backrest segment (4.2), wherein at least one of

Backrest segments (4.1, 4.2) in the unlocked state of a

Use position in a non-use position or vice versa foldable,

characterized in that between the adjacent

Lehnensegmenten (4.1, 4.2) a spring unit (7) is arranged, which with these backrest segments (4.1, 4.2) in a mechanical

Interdependence stands.

Second adjusting device (1) according to claim 1,

characterized in that the spring unit (7) by means of the mechanical operative relationship in a locked state of the adjacent backrest segments (4.1, 4.2) is biased in its position of use.

3. adjusting device (1) according to one of the preceding

claims,

characterized in that the spring unit (7) when unlocking the adjacent backrest segment (4.2) from the use position relaxed so that the unlocked backrest segment (4.2) moves relative to the body-side backrest segment (4.1).

4. adjusting device (1) according to one of the preceding

claims,

characterized in that the spring unit (7) when unlocking of the body - side backrest segment (4.1) from the

Use position so relaxed that both

Move backrest segments (4.1, 4.2).

5. adjusting device (1) according to one of the preceding

claims,

characterized in that the spring unit (7) by means of the mechanical action context in a locked state of the body-side backrest segment (4.1) is biased in the non-use position.

6. adjusting device (1) according to one of the preceding

claims,

characterized in that the adjacent

Lehnensegmente (4.1, 4.2) each have a driver (4.1 .1, 4.2.1), on which engages the spring unit (7) for producing the Wirk context or tangible.

7. adjusting device (1) according to claim 6,

characterized in that one of the drivers (4.1 .1) on the body-side backrest segment (4.1) is fixed and the other driver (4.2.1) is attached to the adjacent backrest segment (4.2).

8. adjustment device (1) according to one of the preceding

claims,

characterized in that the spring unit (7) comprises a tensionable in two directions coil spring, wherein a to the

Mitnehmer (4.1 .1, 4.2.1) engaging spring end (7.1) is angled.

9. adjustment device (1) according to one of the preceding

claims,

characterized in that the body-side driver (4.1 .1) at a spring-side end two opposite in the

Spring unit (7) engaging stops (4.1 .2, 4.1 .3), so that the body-side driver (4.1 .1) biases the spring unit (7) during a pivoting movement of the body-side backrest segment (4.1) from the use position to the non-use position and vice versa ,

10. adjusting device (1) according to claim 9,

characterized in that the two stops (4.1 .2, 4.1 .3) are spaced apart to form a game (SP).

1 1. Adjusting device (1) according to claim 9 or 10,

characterized in that the spring unit (7) in the region of a reversal of the use in the non-use position or vice versa against the stops (4.1 .2, 4.1 .3) runs.

12. adjusting device (1) according to one of the preceding

claims,

characterized in that the driver (4.2.1) at a spring-side end a third stop (4.2.2), so that the adjacent driver (4.2.1) the spring unit (7) during the pivoting movements of the adjacent backrest segment (4.2) the non-use position in the use position biases.

13. A seat arrangement for a vehicle, comprising an adjusting device (1) according to one of the preceding claims.