| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and small jump umbrella multifoldable in four steps. SOLUTION: This umbrella is equipped with a rib assembly 2 at least constituted of a central shaft 1 comprising four telescopic tubes mutually engaged with, a top rib 21 rotatably attached to the top part of the central shaft, spread ribs 22 rotatably connected to the top rib and a lower runner 23 rotatably attached to the central shaft, and various ribs rotatably connected to the top rib and spread ribs, and an opening spring 3 to open the umbrella elastically held in the central shaft, a plurality of closing springs 4 arranged on the rib assembly to close the umbrella. The umbrella also has a controller equipped with an upper roller 563 rotatably disposed on the upper part of the centra shaft, a lower roller 564 rotatably disposed on the lower runner, and an uppermost roller 565 rotatably disposed on the top part of the central shaft to wind up a tension rope continuously changing so as to make the umbrella a four step foldable. umbrella to directions.
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