Seat shell with adjustable support elements

Abstract

The invention relates to a seat shell which is especially designed to be mounted on the chassis of a wheel chair or a stroller, and that comprises adjustable support elements ( 34 ) for supporting the person seated in said seat shell. The aim of the invention is to provide a seat shell with which the position of the seated person on the seat can be fixed by easily adjustable and reliably fixable support elements. To this end, the support elements ( 34 ) are disposed above the two lateral edges of the seat ( 2 ) and their distance to each other in the transverse direction of the seat ( 2 ) is adjustable.

1 . A seat shell, which is provided for attachment to the chassis ( 15 ) of a wheelchair or a stroller in particular, having a seat ( 2 ) and a backrest ( 1 ), as well as adjustable support elements ( 34 ) for supporting the person sitting in the seat shell, characterized in that the support elements ( 34 ) are situated above the two side edges of the seat ( 2 ) and the distance between them in the transverse direction of the seat ( 2 ) is adjustable.  
     
     
         2 . The seat shell as recited in  claim 1 , characterized in that a support element ( 34 ) is pivotably attached to each longitudinal edge of the seat ( 2 ).  
     
     
         3 . The seat shell as recited in  claim 1  or  2 , characterized in that at least one bracket ( 37 ) carrying the support element ( 34 ) is articulated on each longitudinal edge of the seat ( 2 ).  
     
     
         4 . The seat shell as recited in  claim 3 , characterized in that each longitudinal edge of the seat ( 2 ) has a longitudinal bore hole ( 7 ) in which a threaded rod ( 40 ) is situated, which has a head ( 41 ) on its front end for positive engagement of a wrench and which exerts a clamping force on the bracket ( 34 ) when tightened.  
     
     
         5 . The seat shell as recited in  claim 4 , characterized in that each longitudinal bore hole is situated within an extruded profile ( 4 ) on a lateral edge of the seat ( 2 ).  
     
     
         6 . The seat shell as recited in  claim 4  or  5 , characterized in that the threaded rod ( 40 ) exerts a tension force on two parallel brackets ( 34 ).  
     
     
         7 . The seat shell as recited in  claim 6 , characterized in that the two brackets ( 34 ) are attached parallel to one another to a common connecting sleeve ( 38 ).  
     
     
         8 . The seat shell as recited in  claim 7 , characterized in that the connecting sleeve ( 38 ) is mounted in the longitudinal bore hole ( 7 ) on the longitudinal edge of the seat surface ( 2 ).  
     
     
         9 . The seat shell as recited in  claim 8 , characterized in that the threaded rod ( 40 ) is situated within the connecting sleeve ( 38 ).  
     
     
         10 . The seat shell as recited in claims  3  through  9 , characterized in that the support element ( 34 ) is pivotably mounted on the bracket ( 37 ).  
     
     
         11 . The seat shell as recited in  claim 10 , characterized in that the support element ( 34 ) has a metal sheet ( 35 ) and a pad ( 36 ), a folded area ( 46 ) of the metal sheet ( 36 ) forming the receptacle for the pivot axis of the support element ( 34 ).  
     
     
         12 . The seat shell as recited in  claim 11 , characterized in that the bracket ( 37 ) has a slit ( 53 ) into which the folded area of the metal sheet ( 46 ) is inserted.  
     
     
         13 . The seat shell as recited in  claim 12 , characterized in that a draw spindle ( 42 ) forming the pivot axis of the support element ( 34 ) and generating a clamping force securing the bracket ( 37 ) on the metal sheet ( 35 ) passes through the bracket ( 37 ) and the folded area ( 46 ) of the metal sheet ( 35 ).  
     
     
         14 . The seat shell as recited in  claim 13 , characterized in that the draw spindle ( 42 ) passes through two brackets ( 37 ) and folded areas ( 46 ) of the metal sheet ( 35 ) of the support element ( 34 ) simultaneously.  
     
     
         15 . The seat shell as recited in  claim 13  or  14 , characterized in that the draw spindle ( 42 ) has a screw head ( 45 ) on its front end for positive engagement of a wrench.