| 主权项 |
1. An automatic umbrella, comprising:
a handle; a control unit housed inside the handle comprising a control ring, a button, a control pin, and a locking pin; a tube unit comprising a first tube, a second tube, and a third tube telescoping together; a top nest having a first inner plug, a bottom side of the top nest fixedly joined to a top end of the third tube; an inner tube fixedly joined to a bottom side of the inner plug of the top nest; a runner threaded by the tube unit; a bullet head inside the tube unit; a plurality closing springs; a plurality of ribs radially extended from between the top nest and the runner, each rib configured with one of the plurality of closing springs; a main spring; and a secondary spring; wherein a second inner plug is positioned inside a top end of the second tube; a vertically movable reinforcing tube is housed in the second tube and capable of moving upward through the inner plug of the second tube and extending outside the second tube; the main spring has its top end against the reinforcing tube, and its bottom end in a lower part of the first tube, so that the main spring is held between the first and second tubes and has an extension length exceeding a sum of the first and second tubes in an expanded condition of the first and second tubes; and the secondary spring is inside the third tube with a top end against a bottom side of the inner plug of the top nest and a bottom end against a top side of the inner plug of the second tube. |
