Patent ID: 8104728

Claim:
An adjustable display screen support comprising: a support arm, said support arm having a bottom end, a top end opposite to said bottom end, and a connector provided at said top end; a mounting assembly provided at the bottom end of said support arm for securing said support arm to the top of a desk; a coupling block fastened to said connector of said support arm; a rail mounted on said coupling block; and a display screen mount mounted on said rail to support a display screen; wherein: said coupling block comprises a base frame, said base frame having an axle hole and a bottom hook hole, an attachment frame affixed to said rail and attachable to said base frame, said attachment frame having a bottom hook for hooking in said bottom hook hole of said base frame and a latch hole near said bottom hook, and a lock mounted in said axle hole of said base frame and operable to move a latch thereof in and out of said latch hole for locking/unlocking said base frame and said attachment frame; and said rail comprises a flat base panel, said flat base panel having at least one longitudinal sliding slot, a cover shell fixedly mounted with said display screen mount and fixedly covered on said flat base panel, a slide mounted inside said cover shell and affixed to said attachment frame of said coupling block and movable along said at least one longitudinal sliding slot relative to said display screen mount and the display screen being supported on said display screen mount, said slide having at least one sliding flange inserted through and movable along said at least one longitudinal sliding slot and affixed to said attachment frame of said coupling block and at least one accommodation chamber, and at least one spiral spring respectively mounted in said at least one accommodation chamber, said at least one spiral spring each one end affixed to said slide and an opposite end affixed to one end of said cover shell; wherein said lock comprises a bolt inserted through the axle hole of said base frame of said coupling block and fixedly connected with the latch of said lock, two spring-supported pins that are provided at said bolt at two opposite sides near said latch and movable between a first position where said spring-supported pins are received inside said axle hole and a second position where said spring-supported pins are stopped outside said axle hole, a knob coupled to one end of said bolt opposite to said latch for pressing by the user to move said spring-supported pins from said second position to said first position so that said bolt is rotatable with said knob to move said latch in and out of said latch hole, and a spring member is sleeved onto said bolt and stopped between an outside wall of said axle hole and said knob.