CONSTRUCTION MANAGEMENT self-opening and self-umbrellas

摘要

Proposed control structure for mounting a handle self-opening and self-closing of the umbrella, which comprises a wheel, preventing reverse run, around which is wound the safety cable passing through the central shaft of the umbrella and having an end attached to the wheel, prevents a reverse run, and the end attached to the dome Shut element which comprises a latch and a working rod, located above the wheel, preventing the reverse course. When the umbrella is compressed and locked, the latch engages with a toothed surface of the wheel, preventing reverse run, whereby, if the closing of the umbrella error occurs, reverse rotation of the wheel prevents the latch, and prevents the cable safety unwinding connected to the wheel, prevents a reverse course to do not give the central rod is not desirable to open up and not give instantly unclenched spring central stem.