Inclination adjusting assembly for seat of chair

Abstract

An inclination adjusting assembly for a seat of a chair includes a disk; two coupling blocks limited at a bottom of the disk; the two coupling blocks having threaded holes, respectively to be threaded to an adjusting threaded rod so that by threadedly moving the coupling blocks, one of the coupling block fixed to a retaining sheet of the disk; an upper end of each coupling block being formed with an inclined surface; a pad being movable along the two inclined surfaces; a control rod connected to the pad; a first end of the control rod being engaged to the pad; a second end of the control rod being connected to an engaging tube; the tube having a polygonal through hole; and a polygonal post combined to the disk; a section of the polygonal post penetrating through and tightly engaging with the through hole of the tube.

1 . An inclination adjusting assembly for a seat of a chair comprising:
 a disk combinable to the seat of a chair, or the disk being a seat of a chair;   two coupling blocks limited at a bottom of the disk; the two coupling blocks having threaded holes, respectively to be threaded to an adjusting threaded rod so that by threadedly moving the coupling blocks, the coupling blocks will move along a straight path so that the two coupling blocks move closely or far away from one another; one of the coupling block fixed to a retaining sheet of the disk; an upper end of each coupling block being formed with an inclined surface; a pad being movable along the two inclined surfaces by two inclined surfaces of the pad to contact the two surfaces, respectively;   a control rod connected to the pad; a first end of the control rod being engaged to the pad; a second end of the control rod being connected to an engaging tube; the tube having a polygonal through hole; and   a polygonal post combined to the disk; a section of the polygonal post penetrating through and tightly engaging with the through hole of the tube.   
     
     
         2 . The inclination adjusting assembly for a seat of a chair as claimed in  claim 1 , wherein an upper end of the pad is formed with a notch; a first end of the control rod being engaged to the notch of the pad. 
     
     
         3 . The inclination adjusting assembly for a seat of a chair as claimed in  claim 1 , wherein one end of the adjusting threaded rod is connected to an adjusting handle which is exposed out of the seat. 
     
     
         4 . The inclination adjusting assembly for a seat of a chair as claimed in  claim 1 , wherein one end of the adjusting threaded rod connected to a switch unit; the switch unit is further connected to an adjusting handle; the switch unit serves to connect the adjusting handle to the adjusting threaded rod or to isolate the adjusting handle from the adjusting handle. 
     
     
         5 . The inclination adjusting assembly for a seat of a chair as claimed in  claim 1 , further comprising an elevation adjusting unit; the elevation adjusting unit including a stand tube; the stand tube being able to combine with a movable end of a pressure lifting cylinder; the stand tube being connected to a first connecting tube; the first connecting tube being further connected to a sleeve tube; the sleeve tube being further connected to a second connecting tube; a section of the polygonal post loosely passing through the sleeve tube; and thus, the lifting or descending of the seat will not affect the sleeve tube. 
     
     
         6 . The inclination adjusting assembly for a seat of a chair as claimed in  claim 1 , wherein each of two lateral sides of the disk is formed as a stop sheet; two ends of the polygonal post are welded to the two stop sheets of the disk so as to be interactive with the disk.