US Patent 10107448 Adjustment mechanism and lifting device having the adjustment mechanism

An adjustment mechanism is configured to be disposed between inner and outer tubes of a lifting device, and includes two angularly space-apart abutment modules configured to be disposed on an inner wall surface of the outer tube and each of which has an abutment unit configured to abut against an outer wall surface of the inner tube, and an adjustment module including an adjustment seat, and a pressing unit and a drive member both disposed on the adjustment seat. The drive member is operable to drive movement of the adjustment seat relative to the outer tube so as to push the pressing unit against the outer wall surface of the inner tube to thereby abut the outer wall surface of the inner tube against the abutment units of the abutment modules.