Patent ID: 8366060

Claim:
A supporting arm assembly, comprising: an upper arm having two ends; a lower arm pivotally connected to one of the ends of the upper arm; a display-connecting device mounted on the upper arm at an end opposite to the lower arm and having a pivotal pin mounted rotatably on the upper arm; a connecting base connected pivotally to the pivotal pin; a display mount mounted securely on the connecting base; an engaging panel mounted in the display mount; and a display holding panel mounted detachably in the display mount and detachably engaging the engaging panel by an engagement between at least one engaging protrusion and at least one engaging recess; and a holding base mounted on the lower arm at an end opposite to the upper arm, wherein the upper arm has a connecting hole defined in the upper arm and holding a bottom end of the pivotal pin of the display-connecting device inside; the pivotal pin of the display-connecting device further has a clamping hole defined diametrically through the pivotal pin at a position near a top end of the pivotal; a slit defined radially in the pivotal pin and communicating with the clamping hole; and a fastener mounted in the pivotal pin and through the slit; and the display-connecting device further has a pivotal rod mounted rotatably in the clamping hole and connected securely to the connecting base to pivotally connect the connecting base with the pivotal pin.