Inclinable support for chair

Abstract

An inclinable support for chairs, oscillating or synchronized armchairs and similar furniture has a device of regulation of the suspension and of the seat inclination, by means of setting an inclination spring ( 8 ), that comprises: at least one inclined surface ( 14 ) between a fixed part ( 13 ) and a mobile part ( 10 ) in contact with the extremity of the said spring; at least one wedge ( 12 ) interposed between the fixed part and the mobile part with at least one inclined surface ( 15 ) complementary to and matching the inclined surface ( 14 ); and means for moving said wedge to cause said fixed and mobile parts to separate or come together.

1 . An inclinable support for oscillating or synchronized chair, having an oscillation spring ( 8 ) and a regulating device to regulate the force necessary to incline said chair by setting of said spring ( 8 ), characterized by said regulating device comprising a fixed part in contact with the said support; a mobile part ( 10 ) in contact with the extremity of the said spring ( 8 ); at least one first surface ( 14 ,  15 ) inclined with respect to the axis of said spring ( 8 ) located on said fixed part and/or on said mobile part; at least one wedge ( 12 ) with at least one second complementary inclined surface that matches said first inclined surface and a screw ( 15 ) or analogous means of moving said wedge against said first inclined surface.  
     
     
         2 . A support according to    claim 1   , wherein said first and second inclined surfaces are plane.  
     
     
         3 . A support according to    claim 2   , wherein said fixed part ( 13 ) and said mobile part ( 10 ) have inclined surfaces.  
     
     
         4 . A support according to    claim 3   , comprising two opposed wedges ( 12 ) each having at least one inclined surface ( 14 ) matched to said fixed part ( 13 ) and/or to said mobile part ( 10 ), said wedges being movable one towards the other.  
     
     
         5 . A support according to the preceding claim, wherein said fixed part ( 13 ) and said mobile part ( 10 ) have two inclined surfaces ( 14 ) with angle of inclination mirror-image with respect to a common straight reference line and wherein said wedges have two inclined surfaces matching said fixed and mobile parts.  
     
     
         6 . A support according to    claim 1   , further comprising a housing ( 2 ) for said back, an oscillating arm ( 6 ) rigidly connected to said center ( 2 ) and coupled with said oscillation spring ( 8 ); a slot ( 18 ) located on said oscillating arm ( 6 ); a stop spacer ( 20 ) mobile parallel to the direction of the axis of oscillation.  
     
     
         7 . A support according to the previous claim, wherein said spacer has a nose ( 19 ) fitting into said slot to engage said arm ( 6 ) in two different positions.  
     
     
         8 . A support according to    claim 1   , further comprising a column adjustable in height ( 24 ) and a finger lever ( 23 ) for the regulation in height of the said adjustable column ( 24 ), the said spacer ( 20 ) being movable by a pivot ( 21 ) which controls the said finger lever.  
     
     
         9 . A support according to    claim 1   , comprising shaped-irons ( 31 ) supporting the seat, provided with slots ( 34 ) and sliding on pivots ( 32 ,  33 ) connected to a fork ( 1 ) and to said body ( 5 ), wherein one ( 33 ) of the said slide pivots of the shaped-irons ( 31 ) of support of the seat is axially mobile, commanded from the outside (M), against the action of a spring, to allow the stop of the horizontal slide of the said shaped-irons.  
     
     
         10 . An oscillating or synchronized chair, characterized by comprising a support according to an any of the previous claims.