Device for adjusting the inclination and consequently the height of the arms with respect to the plane of the seat of a chair

Abstract

The invention concerns a device for adjusting the inclination and, consequently, the height of the arms ( 2 ) with respect to the plane of the seat of a chair. Such a device is suitable for being applied in particular to office chairs and is characterized in that it consists of a gas spring ( 5 ), coupled with a lever arm ( 6 ), so as to form a link mechanism fitted between the arm and the back.

1 . Device for adjusting the inclination and, consequently, the height of the arms with respect to the plane of the seat of a chair, to be applied in particular to office chairs, consisting of a gas spring, coupled with a lever arm, so as to form a link mechanism fitted between the arm and the back, said two elements being hinged together at their end points ( 7 ), the device wherein the pins ( 8 ,  9 ) of said two elements are idly fitted on the rigid wall ( 3 ) of the back ( 4 ).  
   
   
       2 . Device, according to  claim 1 , wherein it supports the arched structure ( 2 ), which supports one or both of the arms.  
   
   
       3 . Device, according to  claim 2 , wherein the arched structure ( 2 ) is applied and supported on the lever arm ( 8 ), in a position opposite the spring ( 5 ) through the screws ( 10 ), outside the wail ( 3 ) and partially penetrating into the back through the opening ( 11 ) made on said wall.  
   
   
       4 . Device, according to  claim 3 , wherein with the variation in stroke of the spring ( 5 ), i.e. with the variation in distance between the two pivot points ( 7 ,  8 ) of the spring itself, the rotation of the lever arm ( 6 ) on the pin ( 9 ) and therefore the desired inclination of the arms ( 2 ) is carried out.  
   
   
       5 . Device, according to  claim 1 , wherein the actuation of the gas spring ( 5 ) is obtained mechanically through a flexible wire ( 12 ) connected to a button ( 13 ), arranged on one of the arms.  
   
   
       6 . Device, according to  claim 1 , wherein the actuation of the gas spring ( 5 ) is carried out with an electronic command.