Patent ID: 7891633

Claim:
An outdoor umbrella, comprising: a frame; a supporting shaft supporting said frame, wherein said supporting shaft comprises a rotatable shaft body having a hollow structure to define a shaft cavity therein; and an adjustable rotation base, which comprises: a base housing arranged to couple with said supporting shaft to support said frame in an upright manner; and a rotation arrangement, which comprises: a base shaft upwardly extended from said base housing, and is arranged to be received in said shaft cavity of said rotatable shaft body; an engaging head received in said shaft cavity of said rotatable shaft body, and comprises a plurality of first engaging teeth formed on said base shaft, and a plurality of second engaging teeth formed on a sidewall of said shaft cavity of said rotatable shaft body for engaging with said first engaging teeth; and an actuation unit extended from said engaging head in such a manner that when said actuation unit is actuated, said second engaging teeth is adjustably driven to rotate with respective to said first engaging teeth, so as to impart a controlled relative rotational movement between said rotatable shaft body and said base shaft for allowing said supporting shaft to rotate with respective to said adjustable rotation base.