Height-adjustable leisure chair

Abstract

The present invention relates to a height-adjustable chair, mainly comprising a first post, a second post, a lock clamp, a seat and a seatback. The first post is of a section of sleeve tube with a tripod mount for the chair to stand on the ground. The second post is also a section of sleeve tube permissible to rise and lower in the first post with a pivot brace and a plurality of support rods for holding the seat and the seatback of the chair. The second post is permitted to slide in and out freely in the first post. A quick-action lock clamp is fixed between the first post and second post, convenient for the operator to easily press the lock wrench for rising or lower the second post within the first post and adjust the height of the chair as it suits his gesture.

What is claimed is:  
     
         1 . A height-adjustable leisure chair comprising 
 a first post having a sleeve tube with a plurality of pivot braces and legs, wherein the sleeve tube has an extended slot;    a second post having a sleeve tube with a smaller diameter than that of a first post and allowed to be inserted into the sleeve tube of the first post and a plurality of connecting rods on a top end of the sleeve tube of the second post, wherein the sleeve tube of the second post is allowed to be risen and lowered in the first post and pulled out of it;    a quick-action clamp lock, which is moveable and disposed on the slot of a first post and can hold or release the sleeve tube of the first post to fix or loose the sleeve tube of the second post;    a seat, which is disposed on the second posts and supported by the spread connected rods of the second post by the spread connecting rods of the second post; and    a seatback, which is pivotally joined with the connecting rods of the second post.    
     
     
         2 . The height-adjustable leisure chair of  claim 1 , wherein the sleeve tube of the first post installed a C-ring with two flanges.  
     
     
         3 . The height-adjustable leisure chair of  claim 2 , wherein the sleeve tube of the second post providing a plurality of holes to receive the flanges of the C-ring.  
     
     
         4 . The height-adjustable leisure chair of  claim 1 , wherein the sleeve tube of the second post is disposed a platter adjacent to the connecting rods.  
     
     
         5 . The height-adjustable leisure chair of  claim 4 , wherein the sleeve tube of the second post provides a lock pin adjacent to the connecting rods, and the platter forms a hole having two opposite sides respectively defining a slot.  
     
     
         6 . The height-adjustable leisure chair of  claim 1 , wherein the quick-action lock clamp comprises a C-clamp, a bolt rod and a quick-actioned wrench, the C-clamp has a hole drilled in each extension end to receive the bolt rod with a nut to fix the bolt rod at one end, a pin vertically pierces through to join the quick-actioned wrench and the bolt rod together, the quick-actioned wrench has a first side wall and a second side wall, where the distance varies from the pin to the first and the second side walls.  
     
     
         7 . The height-adjustable leisure chair of  claim 1 , wherein the seat has a pocket at each corner to receive the corresponding connecting rod of the second post.