Chair chassis

摘要

A chair chassis, comprising a chassis pedestal, a left and a right connecting rod for back, a seat supporting frame, an adjusting handle, the adjusting handle comprises an adjusting screw rod. On the adjusting screw rod exists a locating block for mounting handle and, the first pulling line and the second pulling line are wrapped around it, the two pulling lines are respectively used to lock or unlock the tilting angle of the back and to lock or unlock the position of the supporting frame; the adjusting handle also comprises a block for the pulling line, which is connected with the third pulling line, and the block for the pulling line is connected with the adjusting screw rod and can relatively slide on it. The invention is multi-functioned with the action of only one adjusting handle, and the structure of the invention is compact, and it is convenient to operate.

主权项

1. A chair chassis, comprising a chassis pedestal, on which exist
a left and right connecting rod that is tiltable; a supporting frame that can move forward and backward; an adjusting handle, which is fixed axially on the chassis pedestal, wherein the adjusting handle comprises an adjusting screw rod, and on one end of the adjusting screw rod exists spiral teeth; a locating block of a mounting handle is set on the adjusting screw rod, a first pulling line is wrapped around the locating block of the mounting handle, and the first pulling line can lock or unlock the tilting angle of the left and right connecting rod; wherein a second pulling line is wrapped around the locating block of the mounting handle, which can lock or unlock the position of the supporting frame, a wrapping direction of the second pulling line is opposite to a wrapping direction of the first pulling line; and wherein the adjusting handle comprises a block of pulling line, and the block of pulling line is fixed with a third pulling line, which can control a rising or descending of the chassis, and the block of pulling line can relatively slide along the adjusting screw rod.