DE202006004491U1 - Motor vehicle e.g. multi purpose vehicle, seat, has rear pinion linked at foot by using lower hinge and at cushion by using upper hinge, and coupler linked at central hinge of rear pinion and indirectly at backrest - Google Patents

Abstract

The seat has a front pinion (13) indirectly linked at a base, and a seat cushion (3) linked at the pinion. A rear pinion (35) is provided between the seat cushion and a backrest (5), which is linked at a foot connected with the base. The rear pinion is linked at the foot by a lower hinge (37) and at the cushion by an upper hinge (39). A coupler (45) is linked at a central hinge of the rear pinion and indirectly at the backrest.

Description

The The invention relates to a vehicle seat, in particular a motor vehicle seat, with the features of the preamble of claim 1.

The second and / or third rows of seats of multi-function vehicles (MPV), such as vans or MPVs, are in the Generally designed so that the interior can be variably or freight transport is adjustable. From WO 02/22391 A1, for example, a vehicle seat of the type mentioned above, from a position of use in a suitable position for entry or in a folded bottom position to enlarge the Cargo space is convertible. In this case, a coupling is provided between the seat cushion and the backrest.

Of the Invention is based on the object, an alternative to the vehicle seat to create the type mentioned. This object is achieved by a vehicle seat with the features of claim 1 solved. Advantageous embodiments are the subject of the dependent claims.

Thereby, that as coupling between the seat cushion and the backrest at least a rear swingarm, which by means of a lower joint at the rear Foot and is hinged to the seat cushion by means of an upper hinge, and a Koppel, which at a middle joint of the rear swingarm and at least indirectly is hinged on the backrest, can provide optimal adjustment the coupling to a given geometry take place, at the same time the in a coupled movement of backrest and seat cushion existing Degrees of freedom are reduced so far that a defined movement he follows. The coupling can transmit both train and pressure.

The for the Coupling provided gear members preferably form components of four joints, which preferably define a sequence in the drive, which ultimately leads to a lowering of the backrest of the seat cushion leads. Preferably belongs while the rear swingarm sections different four joints what reduces the number of components and assembly as well simplifies the movement process. To increase the seating comfort is the back preferably tilt adjustable.

The three joints of the rear rocker preferably define an obtuse Triangle, which determines the force and torque transmission between backrest and Seat cushion with regard to the actuating force optimized, so optimized the interaction of the four joints. To the obtuse angle is preferably arranged at the middle joint, wherein the middle joint is preferably in the position of use in front of the connecting line of the lower joint with the upper joint located.

Preferably is the vehicle seat from the use position in a boarding position transferred, which a versatile use in different rows of seats allows especially in a second row of seats next to a vehicle door. In order to in the entry position, the dimension of the folded vehicle seat in the vehicle longitudinal direction preferably is low, the rear foot pivots forward and due to a Linkage to a separately trained front foot also after above. He works preferably by means of the rear rocker The seat cushion is high at the back end, so the seat and backrest surface both approximately point to the front. By a lock or the like, which preferably in the position of use also the attachment of the rear foot to the Base, the rear foot is preferred for securing locked with the front foot.

By doing the base preferably has at least one seat rail pair, can the seat long position finely stepped, if necessary, almost infinitely adjustable. It can while conventional seat rail pairs in which, for example, the two are substantially U-shaped profiled seat rails with their bent inwards or outwards Longitudinal edges one another engage behind each other. By the use of such serial products can the manufacturing cost of the vehicle seat can be reduced.

The Seat rail pairs with the two relative to each other in the longitudinal direction slidable and by means of the rail lock with each other lockable seat rails can also with the feet of one be connected to any other seating system. The feet need not all solvable, i.e. For solving the user, can be connected to the seat rail pairs, but it is also conceivable that the front (or rear) feet are fixed to the seat rail pair connected is.

To connect the feet to these conventional pairs of seat rails, a receptacle is formed in the second seat rail, which is not connected to the vehicle structure, into which the associated foot partially dips. The receptacle can be formed in a structurally simple manner by a recess in the upper side of the second seat rail as the opening of the receptacle and by a disposed within the second seat rail angle plate, which forms the walls of the receptacle together with the side walls of the second seat rail. The recording can ausgebil without angle plate to be. To avoid noise when inserting the foot into the receptacle, a rubber pad may be provided in the receptacle or other suitable location.

Preferably on each receptacle, preferably above it, is a locking bolt provided with which a lock or other locking mechanism of the assigned foot is lockable. The locking bolt can be arranged very low be what the rail height remains low. The locking bolt is preferably with the second seat rail connected by one or two running in the longitudinal direction Has arms which are connected to a retaining clip, the in turn attached to the second seat rail and by means of a Recess allows access to the recording.

alternative the locking bolt has only the portion arranged transversely to the longitudinal direction and is each frontally with the side walls or other areas connected to the second seat rail.

in the The following is the invention with reference to an illustrated in the drawing Embodiment explained in more detail. It demonstrate

1 a partially sectioned side view of the embodiment in a position of use,

2 a 1 corresponding view of the embodiment in the lying position,

3 a 1 corresponding view of the embodiment in the entry position,

4 a 1 corresponding view of the embodiment in the bottom position,

5 a section through a part of the embodiment in the region of a rear foot, and

6 a 1 corresponding view of a modification of the embodiment.

A vehicle seat 1 for a middle or rear row seat of a motor vehicle, such as a van, has a seat cushion 3 and a backrest 5 on which by means of fittings 7 in their inclination relative to the seat cushion 3 is adjustable. In the following directions, it is assumed that the vehicle seat 1 is arranged in the forward direction of travel in the motor vehicle, wherein in a suitable for passenger transport position of use of the vehicle seat 1 the backrest 5 at the back end of the seat cushion 3 located. Under the term seat cushion 3 should be understood the entire assembly, consisting of a structure and a related upholstery. As far as components on the seat cushion 3 are hinged, this is an articulation on the structure of the seat cushion 3 to understand. The basic features of the structure of the vehicle seat 1 are already described in WO 02/22391 A1, whose disclosure content is expressly incorporated.

In the following, for simplicity, only the left vehicle seat side of the substantially symmetrical vehicle seat 1 described, and first in a special position of use, namely the design position in which the backrest 5 for example, tilted backwards by 23 ° relative to the vertical. At a base connected to the structure of the motor vehicle 9 is a front foot 11 attached, in the present case firmly connected. The front foot 11 but could also be solvable with the base 9 be locked. At the front foot 11 is by means of a front swingarm 13 the seat cushion 3 hinged, this front swingarm 13 is provided at both ends with joints, one of which the articulation on the front foot 11 and the other the articulation at the front end of the seat cushion 3 forms.

The base 9 is formed in the embodiment as a seat rail pair, which has the possibility of a longitudinal adjustment of the vehicle seat 1 opened, but may alternatively be formed as a single, permanently connected to the vehicle structure component or be the vehicle structure itself. The different variants of the base 9 can also be combined to form a modular system. The base 9 in the present case has a first seat rail connected directly to the vehicle structure 9a and a second seat rail slidable relative thereto longitudinally 9b on. The two essentially U-shaped profiled seat rails 9a and 9b engage behind each other mutually with their inwardly or outwardly bent longitudinal edges and are - by means of a known rail lock - locked together. In the second seat rail 9b is at the rear end on the top of a recess 14a provided, which together with a longitudinally arranged, repeatedly bent transversely to the longitudinal direction angle plate 14b a recording 14 in the second seat rail 9b Are defined. The angle sheet 14b can also be omitted.

Above each shot 14 is transverse to the longitudinal direction of a locking bolt 15 arranged, on each of which a respective perpendicular projecting, extending in the longitudinal direction arm is integrally formed. The base 9 has an adapter 17 on, which above the recess 14a also has a recess. The adapter 17 takes as Hal teklammer on both longitudinal sides of the respective longitudinally extending arm of the locking bolt 15 positively and is connected thereto, preferably welded. The adapter 17 is on top of the second seat rail 9b attached, preferably screwed or riveted to this.

At the base 9 is also in the direction of travel behind the front foot 11 one from the front foot 11 specially trained rear foot 21 arranged, which by means of one on the rear foot 21 attached castle 23 detachable with the base 9 is locked, more precisely with the second seat rail 9b locked and thus indirectly connected to the vehicle structure. For this, the rear foot dives 21 (with the lock 23 ) partially in the recording 14 and locked with the locking bolt 15 ,

In addition, the rear foot 21 by means of a hindfoot four-jointed joint 26 on the front foot 11 articulated, with the four gear members of the hindfoot four-bar linkage 26 a first handlebar 27 and one in the direction behind the first handlebar 27 arranged second link 29 include each having joints at both ends. At the back foot 21 is also a first fitting part of the fitting 7 attached, while a relative to the first fitting part about the backrest pivot axis 33 swiveling and with this lockable second fitting part of the fitting 7 on the backrest 5 is attached.

A rear swingarm 35 is by means of a lower joint 37 right at the back foot 21 and by means of a - in the use position above the lower joint 37 arranged - upper joint 39 on the seat cushion 3 hinged, namely the rear end of the seat cushion 3 to. The base 9 with the feet 11 and 21 , the two wings 13 and 35 and the seat cushion 3 define as four gear members a pillow four-bar linkage 40 , The two wings take 13 and 35 each other from the parallelism deviating orientation, which is supported by different lengths.

Between the two joints 37 and 39 is by means of a middle joint 43 a paddock 45 hinged at one end, which at its other end by means of a rear joint there 47 on the backrest 5 (or a permanently connected component, such as a fitting part of the fitting 7 , or on the connecting element of such a component with the backrest 5 ) is articulated. In the position of use, the rear joint 47 clearly above and a little behind the backrest pivot axis 33 arranged. In case of a front crash, the paddock is used 45 as a train to crash forces on the seat cushion 3 act, from - unlocked in the exemplary embodiment - pillow four-bar linkage 40 to the rear foot 21 and further into the base 9 to lead.

The back foot 21 , the rest 5 between the backrest pivot axis 33 and the rear joint 47 , the paddock 45 and the rear swingarm 35 between the lower joint 37 and the middle joint 43 form as four gear members a coupling four-bar linkage 48 , The middle joint 43 is in the position of use a little before the line connecting the two joints 37 and 39 ie the three joints 37 . 39 and 43 define an obtuse triangle, with the obtuse angle at the middle joint 43 is arranged. This triangle forms the basic form of the rear swingarm 35 ,

When tilting the backrest 5 The fitting will be on every vehicle seat side 7 unlocked, the back 5 around the backrest pivot axis 33 pivoted to the desired position, and then every fitting 7 locked again. The coupling-four-joint 48 forces the rear swingarm 41 to a pivoting movement about the lower hinge 37 , so moves the pillow four-bar linkage 40 , This also changes the inclination of the seat cushion 3 something. The rest 5 can also be pivoted flat to the rear, leaving the vehicle seat 1 a recumbent occupies.

To transfer the vehicle seat 1 in a boarding position as an excellent non-use position is the castle 23 unlocked. The back foot 21 now swings by means of the hindfoot four-joint 26 ie the handlebar 27 and 29 , up. The fitting 7 always stays locked. This is the coupling 45 and consequently the rear swingarm 41 in a rigid arrangement relative to the rear foot 21 , The back foot 21 pushes therefore with the rear swingarm 35 the seat cushion 3 at the rear end up, which due to its articulation by means of the front rocker 13 pivots down at the front end, so in total, with the seat in front is upright. The rest 5 on the other hand, it tends slightly forward. When the entry position is reached, in which access to a rear row of seats is facilitated, locks the lock 23 or another locking device with the front foot 11 ie the back foot 21 and the front foot 11 are locked together. The return to the previously occupied position of use takes place after the release of said locking between the feet 11 and 21 in the reverse order of the steps described.

To transfer the vehicle seat 1 in a floor position (flat-floor position) as another excellent non-use position, in which an enlarged cargo space is available, the backrest 5 after unlocking the fitting 7 folded forward. As with the inclination setting mention forces the coupling quadrilateral 48 the rear swingarm 35 to a pivoting movement about the lower hinge 37 and thus moves the pillow four-bar linkage 40 , The coupling-four-joint 48 , ie primarily the paddock 45 , starts by moving the rear swingarm 35 forward, the pillow four-bar linkage 40 and therefore the seat cushion 3 lower. The paddock 45 is at her rear joint 47 associated end formed curved to a cutting into the cushion area of the backrest 5 or alternatively to avoid the provision of a pad gap. With the approach to the bottom position, in which the back of the backrest 5 is at least approximately in the horizontal, is the backrest 5 on the seat cushion 3 , The securing of this folded bottom position is done by locking the fitting 7 , The return to the previously occupied position of use takes place after unlocking the fitting 7 in the reverse order of the steps described.

In 6 is a modification of the vehicle seat 1 shown as a vehicle seat 101 is designated, and may serve as a center seat of a second row of seats, for example, while each a vehicle seat 1 of the embodiment preferably serves as a left and right outer seat of the second row of seats. The vehicle seat 101 the modification is similar to the vehicle seat 1 of the embodiment, unless otherwise described, why the same components bear the same reference numerals. The only difference is that the front foot 11 and the back foot 21 integral with each other to a single (per vehicle seat side) foot 110 are connected, so the rear foot four-bar linkage 26 with the handlebars 27 and 29 eliminated. Accordingly, the entry position is eliminated.

Preferably, the foot points 110 in its rear-facing edge region a defined deformation zone 124 on, in this case, a triangular recess. In the case of a rear-end crash, the deformation of the deformation zone 124 Energy degraded, whereby the fitting torque is reduced. Also the rear foot 21 of the embodiment, at the corresponding location such a deformation zone 124 exhibit.

1, 101

vehicle seat

3

seat cushions

5

rest

7

fitting

9

Base

9a

first seat rail

9b

second seat rail

11

front foot

13

front wing

14

admission

14a

recess

14b

Winkelblech

15

locking bolt

17

retaining clip

21

rear foot

23

lock

26

Hind foot-four bar

27

first handlebars

29

second handlebars

33

Back pivot axis

35

rear wing

37

lower joint

39

upper joint

40

Pillow four-bar

43

middle joint

45

paddock

47

rear joint

48

Coupling four-bar

110

foot

124

deformation zone

Claims (13)

Vehicle seat, in particular motor vehicle seat, with a base ( 9 ), at least one at least indirectly at the base ( 9 ) hinged front swingarm ( 13 ), at least on the front rocker ( 13 ) articulated seat cushion ( 3 ), at least one with the base ( 9 ) connectable foot ( 21 ; 110 ), one on the foot ( 21 ; 110 ) articulated backrest ( 5 ), and a coupling between the seat cushion ( 3 ) and the backrest ( 5 ), the vehicle seat ( 1 ) can be converted into a folded bottom position, at least of at least one use position suitable for the transport of persons, characterized in that as a coupling between the seat cushion ( 3 ) and the backrest ( 5 ) at least one rear rocker ( 35 ), which by means of a lower joint ( 37 ) at the foot ( 21 ; 110 ) and by means of an upper joint ( 39 ) on the seat cushion ( 3 ), and a coupling ( 45 ) at a middle joint ( 43 ) of the rear rocker ( 35 ) and at least indirectly on the backrest ( 5 ) is hinged, is provided. Vehicle seat according to claim 1, characterized in that the front rocker ( 13 ) and the rear rocker ( 35 ) Parts of a pillow four-link ( 40 ) for the articulation of the seat cushion ( 3 ) at the base ( 9 ) and / or on the associated components ( 11 . 21 ; 110 ) form. Vehicle seat according to claim 1 or 2, characterized in that the coupling ( 45 ) a part of a coupling-four-joint ( 48 ), which at the transition from the position of use in the bottom position of the backrest ( 5 ) is driven. Vehicle seat according to claim 2 and 3, characterized in that the of the backrest ( 5 ) powered coupling four-bar linkage ( 48 ) the cushion-Vierge steering ( 40 ) which drives the seat cushion ( 3 ) lowers. Vehicle seat according to claim 3 or 4, characterized in that the rear rocker ( 35 ) between the middle joint ( 43 ) and the lower joint ( 37 ) a part of a coupling-four-joint ( 48 ). Vehicle seat according to one of claims 1 to 5, characterized in that the lower joint ( 37 ), the upper joint ( 39 ) and the middle joint ( 43 ) define an obtuse-angled triangle, the obtuse angle at the middle joint ( 43 ) is arranged. Vehicle seat according to claim 6, characterized in that the middle joint ( 43 ) in the position of use in front of the connecting line of the lower joint ( 37 ) with the upper joint ( 39 ) is located. Vehicle seat according to one of claims 1 to 7, characterized in that the foot ( 21 ) a back foot ( 21 ) is that one from the back foot ( 21 ) specially trained, with the base ( 9 ) connectable front foot ( 11 ) and that the rear foot ( 21 ) by means of at least one handlebar ( 27 . 29 ), in particular by means of a hindfoot four-bar linkage ( 26 ), on the front foot ( 11 ) is articulated. Vehicle seat according to claim 8, characterized in that the vehicle seat ( 1 ) is convertible from the use position into an entry position, wherein the rear foot ( 21 ) is pivoted forward. Vehicle seat according to claim 9, characterized in that the rear foot ( 21 ) by means of the rear rocker ( 35 ) the seat cushion ( 3 ) at the rear end folds up. Vehicle seat according to one of claims 1 to 10, characterized in that the base ( 9 ) At least one to be connected to the vehicle structure first seat rail ( 9a ) and a relative to the first seat rail ( 9a ) in the longitudinal direction by sliding and lockable with this second seat rail ( 9b ) having. Vehicle seat according to claim 11, characterized in that at least the rear foot ( 21 ) detachable with the second seat rail ( 9b ), in particular for this at least partially in a receptacle ( 14 ) of the second seat rail ( 9b immersed). Vehicle seat according to one of claims 1 to 12, characterized in that the foot ( 21 ; 110 ) a defined deformation zone ( 124 ), which is deformed in the event of a crash.