Abstract:
A seat device, in particular a motor vehicle or airplane seat device, has a table mounting unit. It is suggested that the table mounting unit comprises at least one coupling gear.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a U.S. national stage application of PCT/EP2008/000088 filed on Jan. 9, 2008, and claims priority to, and incorporates by reference, German patent application No. 10 2007 001 962.0 filed on Jan. 13, 2007. 
     BACKGROUND 
     The invention is based on a seat device. 
     DE 10 2005 015 237 A1 discloses a generic seat device with a table bearing unit which has a lever guided via tracks. 
     SUMMARY 
     The invention is based on a seat device, in particular a motor vehicle or aircraft seat device, with a table bearing unit. 
     It is proposed that the table bearing unit comprises at least one linkage transmission. In this case, a “linkage transmission” is to be understood as meaning in particular a transmission in which at least two movable elements are connected via a connecting rod. By means of a corresponding configuration, a particularly advantageous path of movement of a table and also a mounting with little tendency to jam can be achieved with a lightweight construction. 
     If the seat device comprises a backrest unit and if at least one correspondence point of the table bearing unit is guided on a path of movement which at least partially corresponds with a path of movement of a correspondence point of the backrest unit, the effect which can advantageously be achieved is that a table which is mounted on the table bearing unit and is in a pivoted-out position can always be guided back easily into an advantageous position against the backrest unit, to be precise in particular if at least a large part of the paths of movement of the correspondence points coincides. 
     If the seat device has a backrest unit which likewise comprises a linkage transmission, the effect which can be achieved is a path of movement of the backrest unit that is comfortable for a passenger. 
     In a further refinement of the invention, it is proposed that the seat device has a backrest unit which has at least one pivot axis corresponding with the table bearing unit, as a result of which the paths of movement of the backrest unit and of the table bearing unit can advantageously be coordinated with each other, and in particular can be designed in a structurally simple manner such that they overlap at least partially, and preferably for the most part, to be precise in particular if the backrest unit and the table bearing unit have at least two corresponding pivot axes. 
     The table bearing unit preferably has a greater range of movement, in particular a greater pivoting range, than a backrest unit of the seat device, as a result of which it can be ensured that a table which is mounted on the table bearing unit can always be carried along together with a backrest of the backrest unit and can nevertheless always be pivoted away from the backrest. 
     In a further refinement of the invention, it is proposed that the seat device comprises a sliding bearing unit via which the table bearing unit is guided in its movement, thus enabling increased stability to be achieved. 
     The guidance can be achieved here in a structurally simple manner if the table bearing unit is coupled to a backrest unit of the seat device via the sliding bearing unit. 
     Owing to the possible reduction in weight, the seat device according to the invention is suitable in particular for an aircraft seat, but in principle a corresponding seat device can also be used in the case of other seats appearing suitable to a person skilled in the art, such as, in particular, in the case of motor vehicle seats, seats for auditoria, etc. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further advantages emerge from the description below of the drawing. The drawing illustrates an exemplary embodiment of the invention. The drawing, the description and the claims contain numerous features in combination. A person skilled in the art will expediently also consider the features individually and put them together to form meaningful further combinations. 
       In the drawings: 
         FIG. 1  shows a schematically illustrated aircraft seat with a seat device according to the invention in a first position in a side view, and 
         FIG. 2  shows the aircraft seat from  FIG. 1  in a second position. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows an aircraft seat with a seat device according to the invention in a first position in a side view. The seat device comprises a backrest unit  14  and a table bearing unit  10  with a table  30  mounted thereon. 
     According to the invention, the table bearing unit  10  has a bearing unit linkage transmission  12 . The bearing unit linkage transmission  12  is of substantially symmetrical design with respect to a central axis of the aircraft seat and, per seat side, comprises in each case two levers  34 ,  36  mounted pivotably on a seat support unit  32 . The description below is restricted to the seat side illustrated, with the seat side which is not illustrated substantially corresponding to the seat side illustrated. 
     The levers  34 ,  36  are connected via a connecting rod  38  which comprises two main parts  40 ,  42  connected fixedly to each other and is of curved design. The levers  34 ,  36  are respectively coupled via a bearing bolt  54 ,  56  to the connecting rod  38  in a manner such that they can pivot about a respective pivot axis  58 ,  60 . At an end facing away from the seat support unit  32 , bearing means  44  are arranged on the connecting rod  38 , by means of which bearing means the table  30  is connected pivotably and displacably to the connecting rod  38 . 
     The backrest unit  14  comprises a backrest unit linkage transmission  22 . The table bearing unit  10  and the backrest unit  14  are guided on corresponding paths of movement  20 , as illustrated by way of example in  FIG. 1  at a correspondence point  16  of the table bearing unit  10  and a correspondence point  18  of the backrest unit  14 . In one configuration, in which the table bearing unit  10  and the backrest unit  14 , to be precise the table  30  together with a backrest  46  of the backrest unit  14 , are coupled by means of a locking unit (not illustrated specifically), the backrest  46  and the connecting rod  38  of the table bearing unit  10  are moved on corresponding paths of movement  20  and the table  30  is carried along on a path of movement exactly corresponding with the backrest  46 . 
     The backrest unit linkage transmission  22  of the backrest unit  14  comprises, per seat side, two levers  48 ,  50  which are mounted pivotably on the seat support unit  32 , with the levers  48 ,  50  having, on the side facing the seat support unit  32 , pivot axes  24 ,  26  which correspond with the levers  34 ,  36 . The levers  48 ,  50  are connected via a connecting rod  52  and are each coupled to the connecting rod  52  via a bearing bolt (not illustrated specifically) in a manner such that they can pivot about pivot axes which, in the configuration in which the table  30  is coupled to the backrest  46  by means of the locking unit, correspond with the pivot axes  58 ,  60 . 
     If the table  30  is unlocked, the backrest  46  and the table  30  can be moved independently of each other and, in particular, the table  30  can be pivoted away from the backrest  46  by means of the table bearing unit  10 , and, in the pivoted-away state of the table  30 , the backrest  46  can be moved independently of the table  30  ( FIG. 2 ). The table bearing unit  10  has a range of movement or a pivoting range  62  which is larger than a range of movement or a pivoting range  64  of the backrest unit  14  such that the table  30  can still be pivoted away from the backrest  46  by means of the table bearing unit  10  if the backrest  46  is very substantially pivoted to the rear from a substantially upright position. In the pivoted-out state ( FIG. 2 ), the table bearing unit  10  bears against a stop (not illustrated specifically). Owing to the corresponding paths of movement  20 , it is ensured that, in each position of the backrest  46 , the table  30  can be pivoted into a predetermined location on the backrest  46  and can be locked there. 
     The backrest unit  14  and the table bearing unit  10  are coupled via a sliding bearing unit  28  of the seat device, via which sliding bearing unit the table bearing unit  10 , to be precise in particular the connecting rod  38 , is guided laterally in its movement. To the side of the backrest  46 , the sliding bearing unit  28  has a first sliding bearing means  66  and, on an inner side of the connecting rod  38 , has a second sliding bearing means  68  corresponding with the first sliding bearing means  66 . The sliding bearing unit  28  is of symmetrical design with respect to the central axis of the aircraft seat and has corresponding sliding bearing means on the seat side which is not illustrated.