Dual use office and leisure chair

Abstract

A dual use office and leisure chair is provided that overcomes the shortcomings of existing technology. A chair back is provided that is hingeably attached with the handrails. Installation of a pneumatic rod and adjustment device hingeably attached to the chair back enables adjustment to different inclination angles for the chair back, the inclination angle is selectively fixed at any angle within the travel of the pneumatic rod. Simple adjustment, easy use, and long lifetime make it possible to achieve office and leisure dual use for the chair.

1 . A chair comprising:
 a plurality of chair legs;   a chassis supported by said plurality of chair legs;   a sitting board mounted to said chassis upward and away from said chassis;   a pair of handrail rails mounted to said sitting board;   a chair back hingeably mounted to said pair of handrails to define an inclination angle; and   a pneumatic rod in mechanical communication between said sitting board and said chair back for selectively changing and locking said inclination angle.   
     
     
         2 . The chair of  claim 1  wherein said sitting board has an open slot to accommodate travel of said pneumatic rod. 
     
     
         3 . The chair of  claim 2  further comprising a cover mounted to said sitting board and pivotally securing a connector to a first end of said pneumatic rod. 
     
     
         4 . The chair of  claim 3  wherein said pneumatic rod has a gas bar extending from a second end of said pneumatic rod that is pivotally connected to a transition connecting board secured to said chair back. 
     
     
         5 . The chair of  claim 1  further comprising an adjustment device in mechanical communication with said pneumatic rod for operating said pneumatic rod. 
     
     
         6 . The chair of  claim 5  wherein said adjustment device further comprises a control button connected to a pulling line, said pulling line operating a winding sheet that in turn controls actuation of said pneumatic rod. 
     
     
         7 . The chair of  claim 1  further comprising a plurality of chassis blocks intermediate between said chassis and said sitting board. 
     
     
         8 . The chair of  claim 1  further comprising a second pneumatic rod mounted in mechanical communication between said plurality of legs and said chassis for selectively lifting said chassis relative to said plurality of legs. 
     
     
         9 . The chair of  claim 8  further comprising an adjustment handle coupled to said second pneumatic rod for operation of said second pneumatic rod. 
     
     
         10 . The chair of  claim 1  wherein said pneumatic rod extends from an underside of said sitting board. 
     
     
         11 . The chair of  claim 1  wherein the inclination angle has a minimum angle of between 80 and 95 degrees. 
     
     
         12 . The chair of  claim 1  wherein the inclination angle has a maximum angle of between 100 and 140 degrees.