Reclining chair with adjustment telescopic tube

A chair comprising:

• a frame including a seat;
• a telescopic tube assembly including an outer tube mounted on said frame below said seat and an inner tube mounted movably inside said outer tube, said inner tube having one end extending out of said outer tube and connected pivotally to a front end of said seat, said one end of said inner tube being movable away from said outer tube to incline said seat, said outer tube having an opening;
• a lock unit mounted on said telescopic tube assembly for locking releasably said inner tube against said outer tube, said lock unit including a torsion spring which has a coiled portion sleeved around said inner tube inside said outer tube adjacent said opening, and first and second arms extending out of said outer tube through said opening from two ends of said coiled portion, said arms normally extending away from one another so as to cause said coiled portion to be wound tightly around said inner tube;
• and
• an operating unit mounted on said frame and connected to said arms for moving said arms toward one another so as to unwind said coiled portion;
• wherein said operating unit includes an operating lever mounted on said frame, and a cable having a first cable end connected to and operable by said lever and a second cable end fixed to one of said arms of said torsion spring to provide a pulling force applied through said lever;
• wherein said operating unit further includes a cable sleeve receiving said cable, said cable sleeve having said first cable end positioned adjacent said operating lever and said second cable end abutting against and positioning said second arm;
• and
• wherein each of said arms has a free end formed into a loop, said cable extending through said loops of both of said arms, said first cable end of said cable having a block member attached thereto to block said first cable end from being released through said loop of one of said arms.