Patent ID: 7648207

Claim:
A rotating structure for armrests comprising: a support mounted to a holder and including a top surface; a receiving chamber formed in the top surface of the support and having an external rim; a plurality of toothed recesses arranged around the external rim of the receiving chamber; a rotary plate including a pivotal member extending therefrom and having circular cross sections including an outer diameter, with the pivotal member corresponding to and pivotally received in the receiving chamber of said support, with the pivotal member having a cutout fixed on one side thereof and extending radially relative to the circular cross sections of the pivotal member; a slidable retaining tab slideable in the cutout and biased against the receiving chamber by a spring, wherein said retaining tab includes toothed protrusions attached thereon and engaging with said toothed recesses; a holding panel for placing a user's elbow, and a bottom of the holding plate assembled with said rotary plate; wherein said retaining tab is biased by said spring in said cutout for matching with the outer diameter of said pivotal member so that said pivotal member is correspondingly received into said receiving chamber of said support, and wherein said rotary plate is axially affixed onto said support and assembled with said holding panel.