Patent ID: 8151811

Claim:
A protective mechanism for automatic umbrella comprising a drive unit, a pulley tackle, a spring motor, a clutch, and a clutch spring respectively assembled to a controlling means of said umbrella; wherein, a strand passing around said pulley tackle and providing with one end thereof affixed to said pulley tackle and with the other end thereof secured to an upper notch of said umbrella; said spring motor being mounted on said pulley tackle, and said clutch being disposed adjacent to said pulley tackle; unidirectional rotor members being respectively and oppositely located on said clutch and said pulley tackle for cooperating with each other; said drive unit and said clutch spring respectively controlling a separation and a contact of said clutch and said pulley tackle; said clutch being separated from said pulley tackle to release said strand from said pulley tackle and tighten said spring motor while stretching said umbrella; said clutch being in contact with said clutch to promote a cooperation between said unidirectional rotor members while collapsing said umbrella, thereby in turn winding said strand round said pulley tackle and loosening said spring motor in time of retracting a stick of said umbrella.