Umbrella drawing-in by winding

1. An umbrella drawing-in by winding, comprising an umbrella fabric, a frame, a shaft and retracting assemblies, wherein the frame includes a notch, a runner and a rib support set, the rib support set has a first end portion and a second end portion, the first end portion is secured at a top end of the shaft via the notch, and the second end portion is slidably secured on the shaft via the runner, the umbrella fabric has folds and is secured on the frame, and the retracting assemblies are secured on one side of the folds, wherein the retracting assemblies are arc-shaped retracting assemblies and each of the retracting assemblies has a solid structure, and an outline of the retracting assemblies is conformal to an outline of the umbrella fabric,

wherein the rib support set is foldable between a retracted state and an expanded state, when the rib support set is in the expanded state, each of the retracting assemblies is uncovered, and when the rib support set is in the retracted state, the retracting assemblies are stacked up with each other, and different layers of the umbrella fabric being arc-shaped and are stacked up with each other,

wherein the umbrella fabric surrounds an axis and has a central point disposed on the axis, the folds include circular umbrella folds that surround the axis and take the central point as a center of circle,

the umbrella is a triple-fold umbrella, a number of the circular umbrella folds is two, the retracting assemblies comprise a medium retracting piece, the medium retracting piece is set on the umbrella fabric between the two circular umbrella folds, and the medium retracting piece has an arc structure and the retracting assemblies are made of non-metal material.

2. An umbrella drawing-in by winding according to claim 1 , wherein the folds include extension folds that extend outward from the central point to a periphery of the umbrella fabric and each of the extension folds is disposed between supporters of the rib support set, and supporting folds that extend outward from the central point to the periphery of the umbrella fabric and correspond in position to the supporters of the rib support set.

3. An umbrella drawing-in by winding according to claim 2 , wherein the retracting assemblies comprise an internal retracting piece and an external retracting piece, wherein the internal retracting piece is set on the umbrella fabric inside an innermost circular umbrella fold, and the external retracting piece is set on the umbrella fabric outside an outermost circular umbrella fold.

4. An umbrella drawing-in by winding according to claim 1 , wherein the retracting assemblies include PU retracting assemblies, TPU retracting assemblies, PET retracting assemblies, PE retracting assemblies, PP retracting assemblies, ABS retracting assemblies, PVC retracting piece assemblies or silicone retracting assemblies.

5. An umbrella drawing-in by winding according to claim 1 , wherein the rib support set is a triple-fold rib support set, a double-fold rib support set or a quadruple-fold rib support set.

6. An umbrella drawing-in by winding according to claim 1 , wherein the umbrella is a manually-openable umbrella, an automatically-openable umbrella or an electrically-openable umbrella.

7. An umbrella drawing-in by winding according to claim 1 , wherein the umbrella is a rain umbrella or a sunshade.

8. An umbrella drawing-in by winding according to claim 1 , further comprising a tie band, wherein the tie band is set on an outside surface of the umbrella fabric, and the tie band is used to fix the umbrella fabric after the umbrella is drawn in and folded.