WO2008014876A1

WO2008014876A1 - Foldable motor vehicle seat

Info

Publication number: WO2008014876A1
Application number: PCT/EP2007/006203
Authority: WO
Inventors: Wolfgang Pellenz; Robin Ndagijimana
Original assignee: Johnson Controls Gmbh
Priority date: 2006-08-01
Filing date: 2007-07-12
Publication date: 2008-02-07
Also published as: DE102006036121A1; DE102006036121B4

Abstract

Motor vehicle seat having a base part which has a seat face (3) and, if appropriate, lateral upholstered supporting elements, a backrest which has a main support face and, if appropriate, lateral upholstered supporting elements, and a mechanism with which the backrest and/or the seat face can be adjusted in a reversible fashion from a position of use into a storage position, characterized in that during the adjustment the shape of the seat face and/or the main bearing face changes.

Description

Foldable motor vehicle seat

The present invention relates to a motor vehicle seat having a base member having a seat surface and optionally lateral Abstützpolster, a backrest having a main bearing surface and optionally lateral Abstützpolster and a mechanism with which the backrest and / or the seat reversible from a use position to a stowed position is adjustable.

Such generic motor vehicle seats are known for example from DE 103 51 157 B3 of WO 2004/043730 A2 and WO 2004/043207 A2. In these motor vehicle seats, the backrest can be folded onto the seat and the entire seat can be moved into a lowered stowage position. Furthermore, the motor vehicle seats on lateral support surfaces, which can be converted from a flat to a curved shape. However, the mechanisms required for this are relatively expensive. In addition, in the generic motor vehicle seats, the actual seat or the main bearing surface of the backrest can not be changed, so that these motor vehicle seats are either not suitable for longer trips or have a comparatively large height in the stowed position.

It was therefore an object of the present invention to provide a motor vehicle seat which does not have the disadvantages of the prior art.

The object is achieved with a motor vehicle seat with a base part, which has a seat and possibly lateral Abstützpolster, a backrest having a main bearing surface and optionally lateral Abstützpolster and a mechanism with which the backrest and / or the seat reversible from a use position in a Stowage position is adjustable, which changes the shape of the seat and / or the main bearing surface during the adjustment.

It was extremely surprising for the person skilled in the art and it was not to be expected that the motor vehicle seat according to the invention would be extremely flat in its stowed position. In the use situation, the motor vehicle seat is curved Seat of the base part and the curved main bearing surface of the backrest. ergonomically very appealing and therefore also suitable for long journeys and not only as an emergency seat.

The motor vehicle seat according to the invention is simple and inexpensive to manufacture and from the use position in the stowed position and vice versa.

According to the invention, the motor vehicle seat has a base part, which is connected to the body of the motor vehicle and occupies a smaller distance to the vehicle body in the stowed position than in the use position. For this purpose, a corresponding mechanism is provided. The base part has a seat surface, which extends generally parallel to the direction of travel of the motor vehicle. On the right and left of this seat Abstützpolster can be arranged, which increase the comfort of the vehicle seat and offer the passenger especially when cornering additional stability. On this base part, a backrest is rotatably arranged, which is also from a stowed position, in which the backrest is parallel to the seat, in a use position in which the backrest is arranged substantially perpendicular to the seat, can be moved over. Accordingly, a hinge is arranged between the base part and the backrest. The backrest has a main contact surface for the back of the motor vehicle occupant. In addition, the backrest can have right pad from the left of the main bearing surface, which take over the functions already performed above. The transfer of the motor vehicle seat from the stowage position to the use position is carried out by folding up the backrest. In this case, the base part is transferred from the stowage to the use position. The folding of the vehicle seat is analogous.

Furthermore, the motor vehicle seat according to the invention has a mechanism with which the backrest and / or the seat part is reversibly adjustable from a use position into the stowed position and vice versa. As a rule, this mechanism will cause, on the one hand, that the backrest can be folded onto the seat surface, but also that the base part and the seat surface are in total one angled or raised position relative to the body in a lowered .Position be transferred. The unfolding of the vehicle seat is analogous.

According to the invention, the shape of the seat surface of the base part and / or the main abutment surface of the back part is to change during the adjustment of the motor vehicle seat from the use position to the stowed position. Due to the change in shape, which is usually converted from a substantially planar shape in the stowed position in a curved or curved ergonomically advantageous shape, has the advantage that the seat in the stowed position extremely flat, but in the position of use for the Fachzeuginsassen is designed so pleasant that it can be carried out on longer rides or rides in impracticable terrain.

Preferably, the thickness of the seat or the main bearing surface of the backrest does not change in the change of the position of the seat. Preferably, only the shape of these surfaces is changed. Preferably, the seat surface and / or the main bearing surface is shortened. In this case, the seat surface of the base part and / or the main bearing surface of the backrest curves so that a curved ergonomically shaped surface is formed.

Preferably, the seat surface and / or the main bearing surface curves around one or more axes transverse to the direction of travel of the motor vehicle.

Preferably, the base part and / or the backrest each have a crossbar which is respectively connected to the seat surface or with the main bearing surface of the back part and which shifts in the change of the motor vehicle seat from the use in the stowed position. By this displacement, the shape of the seat or the main bearing surface is thereby changed.

In a preferred embodiment, the crossbar is slidably mounted on the frame of the base part and the back part.

In another preferred embodiment, the crossbar is guided telescopically in the longitudinal bars of the frame of the seat. Further preferably, the change of the shape of the seat surface and / or the main abutment surface may be effected by a Bowden cable or other mechanical means.

Another object of the invention or a preferred embodiment of the motor vehicle seat described above is that the motor vehicle seat has support pads that change in the adjustment of the motor vehicle seat from the use in the stowed position and vice versa in their shape and / or position, the change of Form or position is done by a gear.

This embodiment of the motor vehicle seat according to the invention has the advantage that it is very simple and inexpensive to perform.

Biasing means as they are necessary, for example, in Bowden cables are not necessary in the motor vehicle seat according to the invention. A motor drive, which transfers the motor vehicle seat according to the invention from the use position to the stowed position and vice versa, can be easily realized in the motor vehicle seat according to the invention.

According to the invention, the adjustment of the shape and position of the Abstützpolster the motor vehicle seat by means of a transmission.

Gear in the context of the invention are systems for converting or for transmitting movements and forces (torques). They consist of at least two, usually three members. A transmission according to the invention is for example a combination of different gears such as front or bevel gears and racks. Further examples of a transmission are cams which cooperate with a surface and thereby drive a component. No transmission in the context of the invention is a Bowden cable drive. Preferably, the transmission gears and / or racks on. Especially .bevorzugt it is in the transmission to a spur / spur gear, spur / rack and / or spur / Kegelradpaarung.

In a further preferred embodiment, the gear is a cam which cooperates with a surface.

In the following the invention will be explained with reference to Figures 1 to 6. These explanations are merely exemplary and do not limit the general inventive concept.

Figure 1 shows the motor vehicle seat according to the invention in his

Transfer from the stowage to the use position.

Figure 2 shows the motor vehicle seat according to the invention in the stowed and in the use position.

Figure 3a, 3b shows a mechanism for changing the shape of the

Main bearing surface of the backrest.

Figure 4a to 4c shows a mechanism for changing the shape of the seat surface of the motor vehicle seat according to the invention

Figure 5a to 5c shows a mechanism for changing the shape and position of the Abstützpolster the base part.

Figure 6a to 6c shows a mechanism for changing the shape of the

Main bearing surface of the back part and a mechanism for changing the position of the Abstützpolster.

FIG. 1 shows the motor vehicle seat 1 according to the invention with a backrest 2 and a base part which has a seat surface 3. The base part and the backrest are connected to each other via a connecting means 12. This connection means can be firmly connected to the frame of the backrest 2 or be integral with this. The connecting means 12 is part of a .Klappmechanismus 5, with the backrest 2 is hinged to the seat. For this purpose, the connecting means 12 is rotatable, for example with a rotation axis, connected to the base part. The connecting means 12 is rotatable, for example by means of the axis of rotation 18, mounted on the attachment 11, which in turn is firmly connected to the body of the vehicle. At its front end, the base part on a mechanism 4, which consists of a lever 13 which is rotatably mounted on one side by means of a rotation axis 17 to the body and is rotatably attached at its other end to the base part. In the left part of Figure 1, the motor vehicle seat is shown in its storage position 2. In this case, the backrest 2 is parallel to the base part with its seat surface 3. The lever 13 is arranged parallel to the body of the vehicle. As soon as the backrest 2 is raised, ie rotated about the axis of rotation 18, the base part is raised with the seat 2, so that the motor vehicle seat, as shown in the right part of the figure, is finally in its use position. In this position and in the stowed position he is usually locked. The movement of the motor vehicle seat from the use position to the stowed position takes place analogously.

The skilled person understands that the mechanisms 4, 5 are present on both sides of the seat.

In Figure 2, the motor vehicle seat according to the invention in the left part of the figure in its storage position V is shown. In the present case, the base part to the right and left of the seat 3 and the backrest 2 right from the left of the main bearing surface 8 support surfaces 6, 7, 9, 10. These support surfaces 6, 7, 9, 10 are in the stowed position V in a substantially horizontal orientation. In addition, the support surfaces are flat, so that they have a total of a very low overall height. This has the advantage that the motor vehicle seat according to the invention has a very low overall height in its stowed position. In the use position G, both the seat of the base part 3 and the main bearing surface 8 of the backrest are curved, which increases the seating comfort and safety of the seats. The seat of the base part 3 and the main bearing surface 8 are curved around a transversely to the direction of travel of the motor vehicle virtual axis. In the In use position, the support surfaces 6, 7, 9, 10 have been folded up to a high, so that they represent a lateral support for the vehicle occupants. Furthermore, the surfaces are curved in themselves, so that they rest closer to the body of the vehicle occupant and offer increased ride comfort. The mechanisms for bending the seat surface 3 and the main bearing surface 8 and for transferring the support surface 6, 7, 9, 10 of the flat horizontal position in a curved, to the surfaces 3, 8 angular position is explained in the following figures.

Figure 3 shows the mechanism for transferring the main abutment surface 8 of the seat back 2 from a substantially planar, flat embodiment in the stowed position to a curved position in the use position. For this, the motor vehicle seat according to the invention has a lever 16 which is rotatably connected at its one end to the attachment 11 and at its other end rotatably connected to a crossbar 14. This crossbar 14 is displaceable on the longitudinal beams 2.1.1. of the frame 2.1 stored. Once the seat is moved from its stowed position to the use position, the lever 16 pushes the cross member 14 upwards. Since the main bearing surface 8 or possibly an underlying support surface 8 ^' at one end to the cross member 2.1.2. the frame is connected at the other end to the cross member 14, the back abutment surface curves forward and shortens itself. This movement of the main bearing surface 8 is represented by the two parts in FIG. 3b. The curvature, in particular, protects the lordosis region of the back of the vehicle occupant. The curvature of the main bearing surface of the motor vehicle occupant at the correct location can be influenced by different choice of material of the main bearing surface 8 or the support surface 8 '. In addition, it is also possible to achieve the curvature by targeted material modification, such as notches, at the desired location of the main bearing surface 8.

FIG. 4 shows the movement of the seat 3 from the storage position (FIG. 4a) into the use position (FIG. 4c). As can be seen from FIG. 4, the seat surface 3 is connected to the base part on the one hand via the cross member 3.1.2 and on the other hand via the cross member 15. The cross member 15 is in turn telescoped in the Side members 3.1.1 led the seat. Furthermore, the frame of the .Basisteils is connected by means of the lever 13 to the body. The lever 13 is arranged at its one end on the axis of rotation 17 which is rotatably mounted on the body. At its other end, the lever 13 is rotatably supported on the frame of the base part by means of the rotary member 29. The lever 13 is approximately L-shaped. Between the rotary member 29 and the rotation axis 17, preferably in the region of the bend of the L ^' s another lever 19 is rotatably mounted. For this purpose, it is mounted on one side by means of the rotary element 30 on the lever 13. On another side, the lever 19 is rotatably mounted on the crossbar 15. If the motor vehicle seat is now transferred from its stowed to its position of use, the lever 19 presses the telescopically guided crossbar 15 in the side members of the seat, so that the seat 3 is shortened and in particular the area at which the thighs of the vehicle occupant on the Seat resting arched, which in turn increases the safety of the vehicle occupant (anti-submarining) and on the other hand the ride comfort. The movement of the seat is represented by the two arrows.

The transfer of the vehicle seat from the use in the stowed position is analogous.

Figure 5 shows a mechanism for changing the position and the shape of the lateral support surfaces 6, 7, wherein the support surface 7 has been omitted for clarity. As can be seen from Figure 5a, there is a longitudinal support of the frame of the base part of a two-piece shaped sleeve 21 and an inserted into the sleeve 21 tube 20. This tube 20 has in its rear region a stop surface 31 against which the rear part of the sleeve 21 is supported. The front part of the sleeve 21 is supported on the pin 28 which is connected to the telescopic arms 33 of the cross bar 15 and is guided in a slot 33 of the insertion tube 20. Furthermore, 21 supporting elements 22 are arranged on the sleeve, on which the support surface 7 is attached. Originally, in the stowed position, the support elements have the greatest distance from each other and are in a parallel (horizontal) position relative to the seat surface 3. In addition, the plug-in tube 20 has a cam 23 which is connected to the inclined surface 24, which is located at the front part of the sleeve,. cooperates.

Once the motor vehicle seat according to the invention is transferred from the stowed to the use position, the cross bar 15 is pushed into the insertion tube 20 and transmits this movement to the pin 28. This pin 28 pushes the front part of the sleeve 21 to the rear. In this case, the surfaces 24 and the cam 23 cooperate, so that the sleeves 21 and thus the support members 22, as shown by the two arrows, are rotated upward. The skilled person understands that the movement of the front sleeve is transferred to the rear sleeve and that the distance A between the support elements 22 is reduced. In Figure 5c, the end position of the support elements 22 is shown. As they are turned upwards, they project beyond the seat surface 3. At the same time, the support elements are curved in the direction of the seat surface 3, since the support elements 22 have been pushed together. The transfer of the support elements from the use in the storage position is analogous.

FIGS. 6a to 6c show a further mechanism for bending the main bearing surface 8 of the backrest and adjusting the support elements 9, 10. This mechanism has in the present case, a gear 23, which cooperates on the one hand with a rack 25 and the other with a bevel gear 27. On the rack 25, the cross bar 14 is arranged. As soon as the motor vehicle seat is transferred from the stowage position to the use position, the toothed wheel 26 rotates counterclockwise, pushing the toothed rack upwards or moving the support elements 9, 10 from a substantially parallel position to an angled position relative to the main abutment surface.

The backward movement is analogous. LIST OF REFERENCE NUMBERS

1 motor vehicle seat

2 backrest

2.1 Frame of the backrest

2.1.1 side member of the frame

2.1.2 Cross member of the frame

3 seats

3.1 Frame of the seat

3.1.1 side member of the seat

3.1.2 Cross member of the seat

4, 5 mechanism

6, 7 support surface

Main bearing surface 'supporting surface, 10 supporting pads

11 Mounting 2 Connecting means between backrest and seat 3 Lever 4, 15 Crossbar 6 Lever 7 Rotary axis 8 Rotary axis 9 Lever 0 Insertion tube 1 Sleeve 2 Support elements 3 Cam 4 Oblique surface 5 Racks 6 Spur gear 7 Bevel gear 8 Pin 9, 30 Rotary element 31 support surface

, 32 telescopic arms

33 slot

A distance

G position of use, position of use

V stowage position, use position

Claims

claims:

1. Motor vehicle seat (1) with a base part, which has a seat surface (3) and optionally lateral Abstützpolster (6, 7), a backrest (2) having a main bearing surface (8) and optionally lateral Abstützpolster (9, 10) and a mechanism (4, 5) with which the backrest and / or the seat surface is reversibly adjustable from a use position (G) to a stowed position (V), characterized in that during the adjustment the shape of the seat surface (3) and / or or the main bearing surface (8) changed.

2. Motor vehicle seat according to claim 1, characterized in that the seat surface (3) and / or the main bearing surface (8) shortens.

3. Motor vehicle seat according to one of the preceding claims, characterized in that the seat surface (3) and / or the main bearing surface curves around a transverse axis to the direction of travel of the motor vehicle.

4. Motor vehicle seat according to one of the preceding claims, characterized in that the seat surface (3) and / or the backrest (2) each have a transverse bar (14, 15), which shifts in the change of position (G, V).

5. Motor vehicle seat according to one of the preceding claims, characterized in that the transverse rod (15) are telescopically guided in the longitudinal rods (3.1.1) of the frame (3.1) of the seat surface (3).

6. Motor vehicle seat according to one of claims 1 - 3, characterized in that the change of the seat surface (3) and / or the main bearing surface (8) takes place by a Bowden cable.

7. Motor vehicle seat according to one of the preceding claims or according to the preamble of patent claim 1, characterized in that the Abstützpolster (4, 5, 6, 7) in the adjustment of the motor vehicle seat in their Change shape and / or position and that the change is done with a gear.

8. Motor vehicle seat according to claim 7, characterized in that the gear has gears and / or racks.

9. Motor vehicle seat according to claim 7 or 8, characterized in that the transmission is a spur / spur gear, spur / rack and / or spur / bevel gear pairing.

10. Motor vehicle seat according to one of claims 7 - 9, characterized in that the transmission is a cam (23) which cooperates with a surface (24).