Patent ID: 6722381
Filing Date: 2004-04-20
Classification: A45B

Abstract:
An umbrella self lock mechanism comprising a winding mechanism and a clutch mechanism, wherein the winding mechanism has a spooler, a handgrip, and a rope through hole on the spooler to provide tightening of a pass through rope, with one end tightened on an umbrella tough, rotation of the handgrip winding the rope and open the umbrella, the clutch mechanism has a front cover to be fixed on an umbrella rod, openings on the front cover, through which to enter into opening on the umbrella rod, the clutch mechanism has a clutch which has an internal ring with threads, the ring has positioning threads engaged with threads of the front cover, the handgrip in the spooler is moved to push and pull a clutch axle box, the spooler has a stop ring with screw thread section at a front and end section, a flexible key pin on the stop ring, whereby after the spooler passes through an opening on an umbrella post and the opening on the front cover, the spring, clutch axle box, and bolted hand grip are fitted with an opening of the spooler through a front cover opening end axis screw thread section, thereby tightening the bolt at the spooler end to prevent the handgrip from falling out, and under normal conditions, the thread of the clutch axle box is fitted with the flexible key pin, and turning the handgrip will push clutch axle box to join with the front cover thus preventing rotation of the spooler and achieving self lock performance.