Chair control arrangement

Abstract

A chair control arrangement for a chair ( 1 ) movable on castors ( 11 ) and having an horizontally swivelable seat is shown. It comprises locking means ( 13, 38 ) for locking translational movement of a chair on its castors ( 11 ) and/or swivel movements of the chair seat and control means ( 41, 85 ) for controlling the locking means ( 13, 38 ) and situated in a position usable by the user of the chair when sitting therein.

1 . A chair control arrangement for a chair movable on castors and having an horizontally swivelable seat carried by chair seat carrying part comprising locking means locking translational movement of a chair on its castors and/or swivel movements of said chair seat carrying part and control means controlling said locking means and situated in a position usable by the user of the chair when sitting on the seat thereof.  
     
     
         2 . An arrangement as claimed in  claim 1 , wherein said control means comprises a Bowden cable.  
     
     
         3 . An arrangement as claimed in  claim 2 , wherein said Bowden cable is operated by a lever situated on the part of the chair carrying the chair seat.  
     
     
         4 . An arrangement as claimed in any preceding  claim 1 , wherein said locking means locks the translational movement of the chair and comprises a plurality of feet raisable and lowerable into and out of engagement with the floor on which the chair is standing.  
     
     
         5 . An arrangement as claimed in  claim 4 , and comprising biasing means for biasing said feet in the direction of the floor.  
     
     
         6 . An arrangement as claimed in  claim 5 , wherein said biasing means comprises a spring.  
     
     
         7 . An arrangement as claimed in  claim 6 , wherein said control means comprises a Bowden cable.  
     
     
         8 . An arrangement as claimed in  claim 7 , wherein said Bowden cable is operated by a lever situated on the part of the chair carrying the chair seat.  
     
     
         9 . An arrangement as claimed in  claim 8 , wherein said lever, on operation, acts on said Bowden cable and raises said feet against the action of said spring and wherein said lever, on release, acts on said Bowden cable to allow said feet to be lowered to the floor under the action of said spring.  
     
     
         10 . An arrangement as claimed in  claim 9 , wherein said feet are mounted on a framework adapted to move upwards and downwards in relation to a fixed member on the base part of the chair.  
     
     
         11 . An arrangement as claimed in  claim 10 , and comprising a pivotal lever pivoted on said frame to move said framework upwards, said pivotal lever comprising an end in contact with an upper surface defined by said frame work.  
     
     
         12 . An arrangement as claimed in  claim 11 , wherein said framework comprises at least one rod passing vertically through apertures in a fixed member on the chair.  
     
     
         13 . An arrangement as claimed in  claim 1 , wherein said locking means locks the swivel movement of the chair seat carrier and comprises a first member swivelable with or stationary relative to the chair seat carrier, a pin carried by said first member and a second member stationary relative to or swivelable with the chair seat carrier respectively and defining a plurality of holes cooperating with said pin to prevent swivelling movement of the chair seat carrier when said pin is engaged in one of said holes.  
     
     
         14 . An arrangement as claimed in  claim 1 , wherein said locking means locks the swivel movement of the chair seat carrier and comprises a first plate swivelable with the chair seat, a pin carried by said first plate and a second plate stationary with respect to the chair seat carrier and defining a plurality of holes arranged circumferentially on said second plate and cooperating with said pin to prevent swivelling movement of the chair seat carrier when said pin is engaged in one of said holes, said first and second the plates being stacked one above the other around the swivel axis of the chair.  
     
     
         15 . An arrangement as claimed in  claim 14 , wherein said pin is adapted to be movable towards and away from said second plate.  
     
     
         16  An arrangement as claimed in  claim 15 , wherein the pin is biased towards the second plate by means of a spring.  
     
     
         17 . An arrangement as claimed in  claim 16 , wherein said control means comprises a Bowden cable.  
     
     
         18 . An arrangement as claimed in  claim 17 , wherein said Bowden cable is operated by a lever situated on the part of the chair carrying the chair seat.  
     
     
         19 . An arrangement as claimed in  claim 18 , wherein said Bowden cable is adapted to act on said pin to move it away from said second plate when said lever is actuated.  
     
     
         20 . An arrangement as claimed in  claim 19 , wherein said lever is adapted to be movable between a first position in which said Bowden cable is released allowing said pin to move under the action of said spring and a second position in which it acts on said Bowden cable to move said pin away from said second plate.  
     
     
         21 . An arrangement as claimed in  claim 20 , and comprising means for selectively locking said lever in its second position.  
     
     
         22 . An arrangement as claimed in  claim 21 , and comprising stop means to prevent the chair seat from swivelling through 360 degrees.  
     
     
         23  An arrangement as claimed in  claim 21 , and comprising stop means to prevent the chair seat from swivelling through between 220 and 350 degrees.  
     
     
         24 . An arrangement as claimed in  claim 14 , and comprising stop means to prevent the chair seat from swivelling through 360 degrees.  
     
     
         25  An arrangement as claimed in  claim 24 , and comprising stop means to prevent the chair seat from swivelling through between 220 and 350 degrees.