Abstract:
Vehicle seat ( 1 ) having a seat part ( 2 ) and a backrest ( 3 ), wherein the supporting structure ( 44 ) of the seat part or the backrest, in particular the side part thereof, integrally has at least one spring element ( 40, 31 ) a pivot point (P) and/or a safety belt connection.

Description:
CLAIM OF PRIORITY 
     This application claims priority to U.S. Application Ser. No. 61/643,587, filed May 7, 2012, the entire contents thereof are incorporated herein by reference. 
    
    
     FIELD 
     The present invention relates to a vehicle seat and comprising a seat part and a backrest, with a structure that is made in an integral manner. 
     BACKGROUND 
     Such a vehicle seat is known from DE 10 2011 106 219. In automotive engineering, there is a continuous desire to be able to produce such a vehicle seat more easily and/or cost-effectively. 
     It was therefore the object of the present invention to provide a vehicle seat or individual components of a vehicle seat which meet(s) the abovementioned requirements. 
     The object is achieved with a vehicle seat having a seat part and a backrest, wherein the supporting structure of the seat part and/or the backrest, in particular the side part thereof, integrally has at least one spring element, a pivot point and/or a safety belt connection. 
     SUMMARY 
     The present invention relates to a vehicle seat with a seat part and a backrest. 
     According to the present invention, the supporting structure of the seat part and/or the backrest, in particular the side part thereof integrally has at least one spring element, a part of the inclination adjuster and/or a safety belt connection. 
     Preferably, the seat part and/or the backrest is produced from plastics material, in particular fibre-reinforced plastics material. The seat part and/or the backrest are preferably produced by providing a fiberstructure, which is bound with a harz. As soon as the structure is stiff enough to remove it from a tool without deformation, it is preferably overmoulded with a plastic material. 
     In a preferred embodiment the supporting structure at least of the side part of the seat part and/or the backrest is provided in an integral manner, i.e. as one single part. 
     In a preferred embodiment, the seat part and/or the backrest integrally has a seat shell and/or cross member. Preferably the seat shell comprises spring elements integrally. Preferably, the seat shell is provided in a displaceable manner relative to the side part of the supporting structure of the seat part, for example by spring elements between the side part and the seat shell and/or in the side part itself. 
     Preferably, the height adjuster of the seat shell is integrated into the side part of the supporting structure of the seat part. More preferably the rear and/or the front region of the seat shell is adjustable in height in relation to the side part of the supporting structure of the seat part. 
     For example, a spring is provided in the side part of the seat part and is stretched, as a result of which the seat shell rises. Preferably, the side part has at least one wedge-shaped surface, along which an element is moved and in the process raises and lowers the cushion shell. 
     Preferably, the supporting structure of the seat part integrally has a cross member on which the seat shell is supported in the event of a front-end impact. 
     Preferably, the side part of the supporting structure of the seat part is provided integrally with the upper rail of a longitudinal seat adjuster. 
     Preferably, the backrest integrally has at least a part of an inclination adjuster and/or integrally has at least a part of a headrest. 
     It is also possible according to the invention to produce the entire vehicle seat integrally, in particular from plastics material, preferably fibre-reinforced plastics material. 
     Another preferred or inventive embodiment of the present invention is a vehicle seat, wherein the seat part and/or the backrest has a cushion which is filed with particles. 
     Due to these particles, the cushion adapts to the shape of the bottom and/or the back of the occupant. Preferably, the particles are provided in compartments, so that their movement within the cushion is restricted. The particles can be made from Styrofoam or the like. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The inventions are explained in the following text on the basis of  FIGS. 1-5 . 
       These explanations are merely by way of example and do not limit the general concept of the invention. 
       In the figures: 
         FIGS. 1 and 1   a  schematically show the integral seat part. 
         FIG. 2  shows a seat shell with spring elements 
         FIGS. 3 and 4  show the production of the structure of the seat part according to  FIGS. 1 and 1   a    
         FIG. 5  shows a cushion with particles. 
     
    
    
     Parts that correspond to one another are provided with the same reference signs in all of the figures. 
     DETAILED DESCRIPTION 
     The present invention relates to a vehicle seat  1  with a seat part  2  and a backrest  3  which is provided at the seat part in a pivotable manner so that the backrest can be removed from its use for example into an easy entry position and/or to adjust the inclination of the backrest for comfort purposes. The seat preferably comprises a longitudinal adjuster. 
     In the embodiment of the vehicle seat  1  according to the invention illustrated in  FIG. 1 , at least the structure of the seat part  2  is configured in an integral manner, i.e. made as a single part. Preferably, the seat part  2  is configured as a plastics part, in particular as a fibre-reinforced plastics part. Arranged integrally on the side part of the seat part  2  is an upper rail  43  which belongs to the longitudinal adjuster  4 . Furthermore, the side part of the seat part  2  has at least one spring element  40 , by way of which the height adjustment of the seat shell  41  can be brought about, in that the distance Δh between the seat shell  41  and the upper rail  43  is changed, as a result of which the spring element  40  stretches elastically or contracts. Preferably, the two spring elements  40  have different spring characteristics, with the spring in the region of the posterior of a seat occupant particularly preferably having a harder spring characteristic than the spring in the region of the thigh rest. Furthermore, a toothing  16  is provided integrally with the side part of the seat part, said toothing  16  being part of the recliner of the vehicle seat according to the invention. Moreover, the vehicle seat according to the invention integrally has two cross members  42 , which connect the two side parts, arranged on the right-hand and left-hand side, of the seat part together. Furthermore, the pivot axis for the backrest  3  is arranged integrally on the seat part  2 . Moreover, the seat part preferably integrally has the pivot bearing P for the backrest. The seat part  2  is also integrally equipped with a seat shell  41  and spring element  31  which is provided between the backrest and the seat part. 
       FIG. 1 a    shows substantially the embodiment according to  FIG. 1 , with the adjustment of the inclination angle of the backrest  3  and the height adjustment of the seat shell being illustrated in the present case. The inclination adjuster  5  may be a discontinuous or continuous adjuster. A movement of the lever  6  can unlock for example the adjustment of the backrest, and the occupant then adjusts the inclination of the backrest with his body. Alternatively or in addition, the lever  6  can drive a gearwheel which rolls on the teeth  16  and as a result adjusts the inclination of the backrest. A person skilled in the art will understand that the adjustment can also take place in a motorized manner, in that at least one and preferably two gearwheels mesh with the toothing  16 . The height is adjusted preferably via a hand wheel  59  which drives for example a cam that pushes the seat shell upwards. This adjuster is provided in the front third of the seat part  45  in order to give the seat part sufficient stability with regard to “submarining”. When the height adjuster is actuated, the springs  40  are spread. The seat shell is returned into a lowered position via the springs  40 . A force transmission means  60  can be coupled to the adjusting mechanism  59 , said force transmission means  60  actuating the spring in the region of the posterior of the seat occupant  46  when the hand wheel is actuated, and so the spring excursion of said spring is different from the spring excursion of the front spring. As a result, the expansion of the springs  40  can be executed differently. 
       FIG. 2  shows the seating shell  41  with spring elements  40  which are integrally provided. This reduces the number of parts needed. 
       FIGS. 3 and 4  show the production of the seat part. As can be seen from  FIG. 3 , in a tool a fiber structure is provided, which is fixed with a harz. As soon as the harz is solidified sufficiently, so that the structure does not deform anymore, it is removed from the tool and overmoulded with a plastic layer in a second tool or in a bath. 
       FIG. 5  shows yet another embodiment of the present invention. Here the cushion comprises a multitude of particles between the seat structure and a cover, so that the cushion adapts to the shape of the bottom and/or back of the seat occupant. 
     LIST OF REFERENCE SIGNS 
     
         
         
           
               1  Vehicle seat 
               2  Seat part 
               3  Backrest 
               4  Longitudinal adjusting device 
               5  Inclination adjusting apparatus 
               6  Adjusting lever 
               15  Side part 
               16  Toothing 
               31  Spring means 
               40  Spring means, height adjuster 
               41  Seat shell 
               42  Cross member 
               43  Upper rail 
               44  Supporting structure 
               45  Front part of the height adjuster 
               46  Rear part of the height adjuster, rear part of the height adjuster of the seat shell 
               59  Height adjuster 
               60  Force transfer means, cable 
               70  particles 
             P Pivot point, pivot axis 
             Δh Amount of the height adjustment