DE102018210627B4 - Seating arrangement, especially back seat - Google Patents

Abstract

Seat arrangement (1), comprising
- a seat part (2) and
- a backrest (3) that can be adjusted to the seat part (2),
wherein the backrest (3) comprises at least two adjacent backrest segments (3.1 to 3.3), between which a spring unit (4) is arranged,
wherein each of the backrest segments (3.1 to 3.3) can be folded relative to the seat part (2) from a position of use (I) into a position of non-use (II) and vice versa and
wherein when one of the backrest segments (3.2) is folded down from the use position (I) into the non-use position (II) and the other adjacent backrest segment (3.3) remains in the use position (I), the spring unit (4) is placed in a stop position (P), in which the other adjacent backrest segment (3.3) comes into engagement with the spring unit (4) when folded down into the non-use position (II), with a stop arm (8) projecting from the adjacent backrest segment (3.2) resting on a stopper (9) which is in the Spring unit (4) waiting for stop position (P) falls.

Description

The invention relates to a seating arrangement, in particular a rear seat, with an adjustable backrest.

A known seat arrangement comprises at least one seat part and a divided backrest with at least one backrest segment and at least one backrest segment adjacent to this, wherein at least one of the or both backrest segments can be folded from a use position to a non-use position or vice versa in the unlocked state.

EP 3 074 269 B1 discloses, for example, a seat arrangement with a spring and damping device, which engages with the backrest after the backrest has moved freely. DE 10 2014 220 405 A1 also discloses a spring-driven folding of a first backrest into a non-use position. DE 10 2014 212 387 A1 discloses a bow spring for the defined spring-supported folding or forward folding of a backrest.

The object of the present invention is to provide a seat arrangement with an improved pivoting device for a backrest of the seat arrangement.

The object is achieved according to the invention by a seating arrangement with the features specified in claim 1.

According to the invention, the object is achieved by a seat arrangement which comprises a seat part and a backrest adjustable to the seat part, the backrest having at least two adjacent backrest segments, between which a spring unit is arranged, each of the backrest segments relative to the seat part from a position of use to a position of non-use is foldable and vice versa and wherein when one of the backrest segments is folded down from the use position into the non-use position and the other adjacent backrest segment remains in the use position, the spring unit is placed in a stop position in which the other adjacent backrest segment engages with the spring unit when folded down into the non-use position arrives, with a stop arm protruding from the adjacent backrest segment falling onto a stopper of the spring unit waiting in the stop position.

An exemplary seat arrangement, in particular a rear seat bench for a vehicle, comprises a seat part and an adjustable, in particular divided, backrest with at least two adjacent backrest segments, with at least one of the backrest segments being foldable in the unlocked state from a position of use into a position of non-use and vice versa and between the adjacent ones A tensionable spring unit is arranged in the backrest segments, which is pretensioned in the use position of one backrest segment and is relaxed in the non-use position of one backrest segment and assumes a predetermined position in which the relaxed spring unit is set up to fold down the other adjacent backrest segment from a use position into one to dampen or stop the non-use position.

In order to pivot or fold down the backrest segment(s) relative to the seat part, they are rotatably mounted about a common folding axis. In particular, the backrest segments are rotatably mounted on the seat part using pivot bearings.

In order to adjust the inclination, a fitting can also be arranged on at least one side or both sides of the seat part. The fitting can include a lower part connected to the structure of the seat part, for example a wobble lower part, an upper part which can be rotated relative to the backrest segment to adjust the inclination thereof, for example a wobble upper part, and a free pivoting part connected to the backrest structure of the backrest segment. The free pivoting part can be pivoted about a central folding axis relative to the upper wobble part for the particularly eccentric free pivoting of the backrest segment, but is otherwise locked with the upper wobble part.

In a further possible embodiment, the spring unit is set up in the stop position to dampen or stop further folding of the other adjacent backrest segment from the stop position into the non-use position. The other adjacent backrest segment folds down into the non-use position against the spring force of the spring unit. Depending on the strength of the spring unit, further folding into the non-use position or into the folded down position can only be dampened or completely stopped.

The advantages achieved with the invention are, in particular, that when the adjacent backrest segment is folded down, the engagement of the adjacent backrest segment on the spring unit causes the folding down of the adjacent backrest segment to be braked or stopped. This in turn leads to injuries to a passenger, for example due to hands or fingers getting caught between the folded seats th and folding backrest segments are avoided or reduced.

The other adjacent or folding backrest segment, for example a driver or stop arm protruding from it, falls onto the positioned spring unit, for example an angled stopper or stop of the spring unit, in particular an angled spring end, whereby the further movement of the backrest segment when pivoting into the non-use position or in the folded position is damped/braked or stopped.

In a possible embodiment, an adapter is arranged between the two adjacent backrest segments. The adapter forms a seat part or floor-mounted stop for the spring unit in its tensioned position or in a starting position in which the backrest segments are placed in the position of use. The spring unit is braced against the stop fixed to the seat part or floor.

In a further possible embodiment, the spring unit is attached with a spring end to the seat part or to a floor-mounted holder. The other, in particular free, spring end is braced against the adapter in the position of use of one backrest segment and is held pre-stressed in this position. In particular, the backrest segment is pretensioned and locked in the position of use, with an actuation unit, for example in the trunk or in the dashboard, being arranged to unlock the backrest segment.

Another aspect provides that the spring unit is set up to be placed in the stop position when one backrest segment is folded down into the non-use position and to relax in the process. By relaxing the spring unit after unlocking the backrest segment, it is supported and made easier to fold down into the non-use position. The backrest segment is thus brought into the non-use position, in particular pivoted or folded, with spring support by relaxing the spring unit. The respective backrest segment is not only folded into the non-use position using its own weight, but is also supported by the spring force of the spring unit into the non-use position.

In the non-use position of the folded backrest segment, the spring unit is placed in the stop position and in particular is completely relaxed.

Each backrest segment can include an associated spring unit, which supports the folding into the non-use position by relaxing. Depending on the size and/or weight of the backrest segment, the associated spring units can have different spring forces.

When the one folded backrest segment is re-erected from the non-use position into the use position, the spring unit is then moved up to the stop on the adapter and is tensioned again from the stop on the adapter by further movement of the backrest segment into the use position.

The backrest segment can be kept locked in the position of use. This lock can be released manually or electrically, for example. In particular, the lock can be removed, for example from a trunk or on the dashboard, so that the unlocked backrest segment pivots or folds with spring support into the folded-down non-use position.

In a possible embodiment, the spring unit is designed as a leaf spring. For example, the spring unit is designed as a spiral spring or flat spiral spring. Alternatively, the spring unit can be designed as a torsion spring, coil spring, torsion spring or tension spring. In particular, the spring unit is designed as a spring subject to bending stress, which is subjected to bending and tensioned after it stops on the adapter.

Furthermore, in the area of the pivoting or folding axis of one backrest segment, a holder can be provided, which forms a lateral extension of the pivoting axis, to which the spring unit is attached at one end.

In one possible embodiment, the adapter is designed to be fixed to the floor or body. For example, the adapter is attached to a floor-mounted seat part or a vehicle floor.

Furthermore, the adapter is arranged fixed to the floor between the mutually facing sides of the adjacent backrest segments.

The holder is designed, for example, as a bolt, in particular a bearing bolt. The bolt protrudes laterally from the backrest segment as an extension in the area of the folding axis. The spring unit, in particular the spring end opposite the free spring end, is held firmly on the projecting bolt.

In addition, at least one of the backrest segments can be rotated using the bearing pin stored. Two separate bearing pins can be provided for both sides of the backrest segment. Alternatively, a bearing pin arranged between the adjacent backrest segments can, for example, have such a length that the mutually facing sides of the adjacent backrest segments are rotatably mounted by means of the one common bearing pin.

• 1 schematisch in perspektivischer Darstellung eine Rücksitzbank mit mehreren verstellbaren Lehnensegmenten,
• 2 schematisch in perspektivischer Darstellung eine Rücksitzbank mit einem zu benachbarten Lehnensegmenten abgeklappten Lehnensegment,
• 3 schematisch einen vergrößerten Ausschnitt eines Bereichs zwischen zwei Lehnensegmenten, in welchem ein Federelement angeordnet ist, wobei die zwei Lehnensegmente in einer aufgeklappten Stellung oder Gebrauchsstellung stehen,
• 4 schematisch einen vergrößerten Ausschnitt eines Bereichs zwischen zwei Lehnensegmenten mit einem relativ zum benachbarten senkrechten Lehnensegment abgeklappten Lehnensegment,
• 5 schematisch in perspektivischer Darstellung ein vollständig abgeklapptes Lehnensegmet und ein zu diesem benachbart teilweise abgeklapptes Lehnensegment,
• 6 schematisch einen vergrößerten Ausschnitt eines Bereichs zwischen zwei Lehnensegmenten, mit Lehnensegmenten in vollständig oder teilweiser abgeklappter Stellung, und
• 7 schematisch in perspektivischer Darstellung ein Ausführungsbeispiel für eine Federeinheit, die an einem Bolzen fest gelagert ist.

A possible embodiment of the invention is explained in more detail below with reference to drawings. Show:

• 1 schematically a perspective view of a rear seat bench with several adjustable backrest segments,
• 2 schematically a perspective view of a rear seat bench with a backrest segment folded down to form adjacent backrest segments,
• 3 schematically an enlarged section of an area between two backrest segments, in which a spring element is arranged, the two backrest segments being in an unfolded position or position of use,
• 4 schematically an enlarged section of an area between two backrest segments with a backrest segment folded down relative to the adjacent vertical backrest segment,
• 5 schematically in perspective representation a completely folded backrest segment and a partially folded backrest segment adjacent to this,
• 6 schematically an enlarged section of an area between two backrest segments, with backrest segments in a completely or partially folded down position, and
• 7 schematically a perspective view of an exemplary embodiment of a spring unit that is firmly mounted on a bolt.

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

1 shows a schematic perspective view of a possible embodiment for a seat arrangement 1, in particular a rear seat for a vehicle. The seating arrangement 1 includes a seat part 2 and a backrest 3.

The backrest 3 is divided and includes several adjustable backrest segments 3.1 to 3.3. This creates corresponding seating units S1 to S3 for several people.

2 shows a schematic perspective view of the seat arrangement 1 with the middle backrest segment 3.2 folded down to form the adjacent and upright backrest segments 3.1 and 3.3.

The respective backrest segments 3.1 to 3.3 can be pivoted relative to the seat part 2, in particular between a use position I and a non-use position II (shown in 2 for backrest segment 3.2) movable, for example foldable. In particular, the backrest segments 3.1 to 3.3 can be adjusted in inclination independently of one another.

In addition, the outer backrest segments 3.1 and 3.3 can be wider than the middle backrest segment 3.2. The middle backrest segment 3.2 is, for example, a so-called through-loading or a narrower backrest segment 3.2, which when folded down in the non-use position II serves as an armrest for a passenger on one of the adjacent seat units S1, S3 with the backrest segments 3.1 and 3.3 in the use position I.

The backrest 3 is divided transversely in the y direction in a width ratio, for example of 40:20:40, into the backrest segments 3.1, 3.2 and 3.3. Any other width ratio, for example 60:40 or 2/3 to 1/3, can also be provided for dividing the backrest 3. Accordingly, the seat arrangement 1 can include only two seat units S1 and S2 or more than two seat units S1 to S3.

The backrest 3 can be adjusted from a substantially vertical position of use I, for example a normal sitting position, to a substantially horizontal or lying non-use position, for example a folded position that increases the loading space, and vice versa. The backrest 3 can be pivoted about a folding or rotation axis D.

In particular, at least two of the three backrest segments 3.1 to 3.3, for example the backrest segments 3.2 and 3.3, are designed to be pivotable about the axis of rotation D.

A tensionable spring unit 4 is arranged between the adjacent backrest segments 3.2 and 3.3. The spring unit 4 is kept prestressed or tensioned in the use position I of one backrest segment 3.2, in particular the narrow or middle backrest segment 3.2.

A spring unit 4 can also be arranged between the backrest segments 3.1 and 3.2 (not shown in more detail).

The spring unit 4 is in the non-use position II of the backrest segment 3.2, as in 2 shown, relaxed. In particular, the spring unit 4 relaxes when the backrest segment 3.2 is moved into the non-use position II until there is no longer any pre-tension.

When the middle backrest segment 3.2 is folded down from the use position I into the non-use position II and the other adjacent or outer backrest segment 3.3 remains in the use position I, the spring unit 4 is placed in a predetermined position, a stop position P, in which the other adjacent or outer backrest segment 3.3 comes into engagement with the spring unit 4 when folded down into the non-use position II.

In the non-use position II of the middle backrest segment 3.2, the spring unit 4 assumes the predetermined waiting or stop position P, in which the relaxed spring unit 4 is set up, the movement of the adjacent, outer backrest segment 3.3 increases when it is folded down from the use position I into the non-use position II to dampen or stop.

When the middle backrest segment 3.2 is raised back into the position of use I, the spring unit 4 is tensioned again.

The advantages achieved by the invention are, in particular, that when the middle backrest segment 3.2 is folded down, a person on an adjacent seat unit S1 can use this folded backrest segment 3.2 as an armrest. For example, if a lock 10 is released for the adjacent backrest segment 3.3, injuries to the person's hand can occur when this adjacent backrest segment 3.3 is folded into the non-use position II. By means of the spring unit 4, which is arranged between the backrest segments 3.2 and 3.3, the folding down of the adjacent backrest segment 3.3 is braked or stopped, so that injury to the person can be avoided or reduced.

The folding backrest segment 3.3, for example a stop arm 8 protruding from it, falls onto the spring unit 4 waiting in the stop position P, in particular a stopper 9, which is designed, for example, as an angled, in particular free spring end 4.1, whereby the further movement of the folding backrest segment 3.3 is at least damped/braked or stopped in the non-use position II or in the folded position.

The stop arm 8 is, for example, an extension, nose or a protruding bolt that is directed in the direction of the middle backrest segment 3.2 and projects laterally from the backrest segment 3.3. The stopper 9 is designed in particular as the free, angled spring end 4.1.

3 shows schematically an enlarged section of an area between the two backrest segments 3.2 and 3.3. The spring unit 4 is arranged in this area. The two backrest segments 3.2 and 3.3 are in the unfolded position or use position I.

The spring unit 4 is designed as a spiral spring or flat spring or wound leaf spring. The spring unit 4 is braced with the free spring end 4.1 against a floor-mounted or body-mounted adapter 5. The free spring end 4.1 abuts a stop on the adapter 5 in the use position I. The stop of the adapter 5 is positioned in such a way that when the middle backrest segment 3.2 is placed in the use position I, it is in front of the middle backrest segment 3.2. As a result, the free spring end 4.1 engages the stop of the adapter 5 when the middle backrest segment 3.2 is folded back before reaching its use position I, so that the spring unit 4 is tensioned into the use position I when the middle backrest segment 3.2 is folded back further.

The other spring end 4.2 is attached to a bolt 6. The bolt 6 in turn is firmly connected to the middle backrest segment 3.2, for example welded.

The bolt 6 serves in particular as part of a pivot bearing for the middle backrest segment 3.2. By means of the bolt 6, the middle backrest segment 3.2 is rotatably mounted relative to the seat part 2. The spring end 4.2 is fastened in the area of the axis of rotation D to a lateral extension of the bolt 6, which protrudes laterally from the backrest segment 3.2. As a result, the bolt 6 takes the spring end 4.2 and thus the spring unit 4 with it when the associated middle backrest segment 3.2 is folded down or raised.

The bolt 6 is fixed to the floor or fixed to the body. The bolt 6 can have such a length that mutually facing side flanks of the adjacent backrest segments 3.2 and 3.3 are rotatably mounted on the bolt 6. The bolt 6 thus forms a common axis of rotation D for the adjacent backrest segments 3.2 and 3.3.

In the use position I of the two backrest segments 3.2 and 3.3, the spring unit 4 is clamped between the adapter 5 and the bolt 6.

The bolt 6 forms the axis of rotation D of the backrest segments 3.2 and 3.3 and is held and fixed in fittings 7 of the backrest segments 3.2 and 3.3.

4 shows schematically an enlarged section of the area between the two backrest segments 3.2 and 3.3 with a middle backrest segment 3.2 folded down relative to the adjacent backrest segment 3.3 and lying in the non-use position II. The adjacent backrest segment 3.3 is still arranged in the use position I. The spring unit 4 is placed in the stop position P, in which it is completely relaxed.

4 shows a stop arm 8 of the adjacent backrest segment 3.3, which comes into engagement with the spring unit 4, in particular a stopper 9 of the spring unit 4, when the adjacent backrest segment 3.3 is further folded down into the non-use position II.

5 shows schematically in a perspective view a completely folded down middle backrest segment 3.2 in the non-use position II, in which the spring unit 4 is completely relaxed and is placed in the stop position P. When the adjacent, outer backrest segment 3.3 is folded down, its stop arm 8 comes into engagement with the stopper 9 of the middle backrest segment 3.2 that has already been folded down. As a result, from the intervention onwards, the backrest segment 3.3 to be folded down brakes during the further folding movement into the non-use position II against the spring force of the spring unit 4. Depending on the spring force of the spring unit 4, the folding movement of the backrest segment 3.3 can also be stopped.

6 shows schematically an enlarged section of the area between the two backrest segments 3.2 and 3.3 with the spring unit 4 and the stop arm 8 of the backrest segment 3.3 to be folded down. The stop arm 8 of the backrest segment 3.3 to be folded comes into engagement with the stopper 9 of the spring unit 4, whereby the further folding movement of the backrest segment 3.3 is braked or stopped.

7 shows an exemplary embodiment of the bolt 6 with the end 4.2 attached to it and the angled free end 4.1, which engages the stop of the adapter 5 to tension the spring unit 4.

Reference symbol list

1

Seating arrangement

2

Seat part

3

backrest

3.1 to 3.3

Backrest segment

4

Spring unit

4.1

spring end

4.2

spring end

5

adapter

6

bolt

7

Fittings

8th

stop arm

9

stopper

10

Locking

D

Axis of rotation

P

stop position

S1 to S3

Seating units

I

Position of use

II

Non-use position

Claims (10)

Seat arrangement (1), comprising - a seat part (2) and - a backrest (3) that can be adjusted to the seat part (2), wherein the backrest (3) comprises at least two adjacent backrest segments (3.1 to 3.3), between which a spring unit (4) is arranged, wherein each of the backrest segments (3.1 to 3.3) can be folded relative to the seat part (2) from a position of use (I) into a position of non-use (II) and vice versa and wherein when one of the backrest segments (3.2) is folded down from the use position (I) into the non-use position (II) and the other adjacent backrest segment (3.3) remains in the use position (I), the spring unit (4) is placed in a stop position (P), in which the other adjacent backrest segment (3.3) comes into engagement with the spring unit (4) when folded down into the non-use position (II), with a stop arm (8) projecting from the adjacent backrest segment (3.2) resting on a stopper (9) which is in the Spring unit (4) waiting for stop position (P) falls. Seat arrangement (1). Claim 1 , whereby the spring unit (4) is set up in the stop position (P), a further folding down of the other adjacent backrest segment (3.3) from the to dampen or stop the stop position (P) in the non-use position (II). Seat arrangement (1). Claim 1 or 2 , with an adapter (5) being arranged between the two adjacent backrest segments (3.2, 3.3). Seat arrangement (1). Claim 3 , wherein the spring unit (4) is or is braced with a spring end (4.1) against the adapter (5). Seat arrangement (1) according to one of the preceding claims, wherein the spring unit (4) is set up to be placed in the stop position (P) and to relax when the one backrest segment (3.2) is folded down into the non-use position (II). Seat arrangement (1) according to one of the Claims 3 until 5 , wherein the spring unit (4) is moved and tensioned as far as the stop on the adapter (5) when one backrest segment (3.2) is re-erected from the non-use position (II) into the use position (I). Seat arrangement (1) according to one of the preceding claims, wherein the spring unit (4) is designed as a leaf spring. Seat arrangement (1) according to one of the preceding claims, wherein in the area of an axis of rotation (D) of one backrest segment (3.2) a bolt (6) is provided, which forms a lateral extension of the axis of rotation (D) on which the spring unit (4) is attached with another spring end (4.2). Seat arrangement (1). Claim 8 , whereby the adapter (5) is attached to the floor or body side. Seat arrangement (1) according to one of the preceding claims, wherein the respective backrest segment (3.1 to 3.3) is positioned pre-stressed in the position of use (I) and is held releasably.

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