Adjustable sofa

Abstract

The present application provides an adjustable sofa which includes a U-shaped sofa bottom frame and a sofa armrest fixed at one side of the bottom frame. A rear upper of the U-shaped sofa bottom frame is fixed with a rear frame, an inner upper of the sofa armrest is provided with a seat cushion, a support pad is provided between an inner lower of the sofa armrest and an upper of the U-shape sofa bottom frame, an extension pad is provided between the seat cushion and the support pad for expanding a width of the sofa, a length adjustment component for extending and contracting the extension pad is fixed on an opposite surface of the extension pad and the U-shaped sofa bottom frame. The length adjustment component can extend the extension pad to extend a space area of the sofa seat cushion area.

What is claimed is: 
     
         1 . An adjustable sofa, comprising a U-shaped sofa bottom frame ( 2 ) and a sofa armrest ( 1 ) fixed on one side of the U-shaped sofa bottom frame ( 2 ), a rear upper of the U-shaped sofa bottom frame ( 2 ) is fixed with a rear frame ( 3 ), an inner upper of the sofa armrest ( 1 ) is provided with a seat cushion ( 4 ),
 wherein a support pad ( 6 ) is provided between an inner lower of the sofa armrest ( 1 ) and an upper of the U-shaped sofa bottom frame ( 2 );   an extension pad ( 7 ) is provided between the seat cushion ( 4 ) and the support pad ( 6 ) to expand a width of the sofa;   a length adjustment component ( 8 ) is fixed on an opposite surface of the extension pad ( 7 ) and the U-shaped sofa bottom frame ( 2 ) to extend and contract the extension pad ( 7 ).   
     
     
         2 . The adjustable sofa according to  claim 1 , wherein an inner wall of the extension pad ( 7 ) is fixed with a fixed plate A ( 71 );
 the length adjustment component ( 8 ) comprises two sets of telescopic connection rod parts ( 81 ) installed between the fixed plate A ( 71 ) and the rear frame ( 3 ), a fixed plate B ( 82 ) and a fixed plate C ( 83 ) parallel to each other and respectively installed between two inner walls of the U-shaped sofa bottom frame ( 2 );   a drive part ( 84 ) is hinged between the fixed plate B ( 82 ) and the fixed plate C ( 83 ); the drive part ( 84 ) is further movably connected to one side of the telescopic connection rod parts ( 81 ) close to the fixed plate A ( 71 ) to drive the telescopic connection rod parts ( 81 ) to extend or contract.   
     
     
         3 . The adjustable sofa according to  claim 2 , wherein the telescopic connection rod parts ( 81 ) comprise a connection rod A ( 811 ) rotationally connected to a side wall of the rear frame ( 3 ), two sides of a bottom of the connection rod A ( 811 ) are rotationally connected to a connection rod B ( 812 ) and a connection rod C ( 813 ); one ends of the connection rod B ( 812 ) and connection rod C ( 813 ) are respectively rotationally connected to a connection rod D ( 814 ) and a connection rod E ( 815 ); one end of the connection rod E ( 815 ) is rotationally connected to a connection rod F ( 816 ); one end of the connection rod F ( 816 ) is rotationally connected to a connection rod G ( 817 ); two sides of one surface of the connection rod D ( 814 ) away from the connection rod G ( 817 ) are respectively rotationally connected to a connection rod H ( 818 ) and a connection rod I ( 819 ); a connection rod J ( 820 ) is rotationally connected between the connection rod H ( 818 ) and the connection rod I ( 819 ); the connection rod J ( 820 ) is rotationally connected to a connection rod K ( 821 );
 an outer end of the connection rod K ( 821 ) is rotationally connected to a connection rod L ( 822 ), an end of the connection rod L ( 822 ) is rotationally connected to a connection rod M ( 823 ); an outer end of the connection rod M ( 823 ) is connected to an articulated seat ( 824 ).   
     
     
         4 . The adjustable sofa according to  claim 3 , wherein the drive part ( 84 ) comprises a servo motor ( 841 ) and a reducer ( 842 ) installed at an output end of the servo motor ( 841 ), an outer shell of the reducer ( 842 ) is hinged with an upper of the fixed plate B ( 82 );
 an end of the reducer ( 842 ) is provided with a ball screw cylinder nut pair A ( 843 ), an upper of the fixed plate C ( 83 ) is connected to an installation plate ( 845 ),   an outer end of the ball screw cylinder nut pair A ( 843 ) is rotatably connected to the installation plate ( 845 ), an outer wall of the ball screw cylinder nut pair A ( 843 ) is rotatably connected to a nut seat A ( 844 ); an outer side of the nut seat A ( 844 ) is connected to a movement guide member ( 846 ), the movement guide member ( 846 ) is movably connected to the articulated seat ( 824 ) to enable the nut seat A ( 844 ) drives the telescopic connection rod parts ( 81 ) to extend or contract.   
     
     
         5 . The adjustable sofa according to  claim 4 , wherein the movement guide member ( 846 ) comprises an engagement rod A ( 8461 ) rotationally connected to the nut seat A ( 844 ) and perpendicular to the ball screw cylinder nut pair A ( 843 ), an outer end of the engagement rod A ( 8461 ) is vertically connected to an engagement rod B ( 8462 ), other end of the engagement rod B ( 8462 ) away from the engagement rod A ( 8461 ) is vertically rotatably connected to an engagement rod C ( 8463 ), other end of the engagement rod C ( 8463 ) is vertically rotatably connected to an engagement rod D ( 8464 ), and an end of the engagement rod D ( 8464 ) is rotatably connected to the articulated seat ( 824 ). 
     
     
         6 . The adjustable sofa according to  claim 5 , wherein an upper side of the seat cushion ( 4 ) is hinged with a back cushion ( 5 ) located at an upper of the rear frame ( 3 ). 
     
     
         7 . The adjustable sofa according to  claim 6 , further comprising an angle adjusting component ( 10 ) that is matched with the drive part ( 84 ) to drive an angle adjustment of the back cushion ( 5 );
 the angle adjustment component ( 10 ) comprises a bevel gear A ( 101 ) installed on an outer wall of the ball screw cylinder nut pair A ( 843 ) close to the reducer ( 842 ), and a support plate ( 102 ) fixed between two sides of a bottom of the U-shaped sofa bottom frame ( 2 ); two sides of an upper of the support plate ( 102 ) are respectively rotationally connected with a rotating shaft ( 103 ) and a ball screw cylinder nut pair B ( 104 ); the rotating shaft ( 103 ) is rotationally connected with a bevel gear B ( 105 ) that meshes with the bevel gear A ( 101 ), and both the rotating shaft ( 103 ) and the ball screw cylinder nut pair B ( 104 ) are rotationally connected with spur gears ( 106 ) that mesh with each other; the ball screw cylinder nut pair B ( 104 ) runs through an inner cavity of the rear frame ( 3 ), and an upper of the ball screw cylinder nut pair B ( 104 ) is rotationally connected with a nut seat B ( 107 ), two sides of an outer wall of the nut seat B ( 107 ) are provided with a top rod ( 108 ) that is vertically connected hereto, and a support rod ( 109 ) is hinged between the top rod ( 108 ) and a rear of the back cushion ( 5 ).   
     
     
         8 . The adjustable sofa according to  claim 1 , wherein an upper of the seat cushion ( 4 ) is provided with an armrest pad ( 9 ) leaning against the upper of the sofa armrest ( 1 ). 
     
     
         9 . The adjustable sofa according to  claim 1 , wherein a bottom of the U-shaped sofa bottom frame ( 2 ) is fixedly installed with feet, and a bottom of the feet is provided with a rubber pad. 
     
     
         10 . The adjustable sofa according to  claim 1 , wherein one side of the U-shaped sofa bottom frame ( 2 ) away from the sofa armrest ( 1 ) is provided with a pair of U-shaped clamp blocks for movably splicing other sofas.