Patent ID: 8286650

Claim:
A protective mechanism for automatic umbrella comprising a drive stem, a pulley tackle, a spring motor, a clutch plate, and a clutch spring respectively assembled to a controlling means of said umbrella; said drive stem slidably disposed in a blocking sleeve axially mounted inside said controller means disposed at a lower end of a telescopic stick and being controlled by a hooked head in said controlling means for moving downwards; said pulley tackle pivoting to a lower part of said drive stem; wherein, a strand ( 53 ) 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; a spring motor being mounted on said pulley tackle, and said clutch plate being disposed under said pulley tackle; said clutch plate and said clutch spring being consecutively installed at a lower part of said drive stem; unidirectional slant gears being respectively and oppositely located on said clutch plate and said pulley tackle for cooperating with each other; said drive stem being pressed downwards by said hooked head and said clutch plate further downwardly pressing said clutch spring for separating from said pulley tackle in time of stretching said umbrella; a strand ( 65 ) being released from said pulley tackle and said spring motor being tightened; without a downward pressing from said hooked head, said drive stem moving upward to render said clutch plate to be engaged by said clutch spring and be in contact with said pulley tackle 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.