Sunshade umbrella with hand-held portable rotatable base mechanism

1. A sunshade umbrella with a hand-held portable rotatable base mechanism, the sunshade umbrella comprising a base assembly, a support assembly arranged on the base assembly and a canopy assembly arranged on the support assembly, wherein the base assembly comprises an upper base plate and a lower base plate which are disposed in a center of the base assembly and are fixedly fitted up and down; and the support assembly comprises a support column and a support tube, the support column is insertedly and fixedly connected to the upper and lower base plates, and the support tube is rotatably sleeved outside the support column,

wherein the base assembly further comprises a plurality of support legs around the base assembly, an inner end of each of the support legs is fixedly fitted between the upper and lower base plates; and a lower side of the upper base plate and an upper side of the lower base plate are provided with grooves engaged with the corresponding support legs.

2. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 1 , wherein an upper center hole edge of the upper base plate for insertedly fitting the support column is bent downward to form an upper extension section, a lower center hole edge of the lower base plate for insertedly fitting the support column is bent upward to form a lower extension section, and the support column is insertedly fitted and fixedly connected to the upper extension section and the lower extension section, respectively.

3. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 1 , wherein the support assembly further comprises a bottom tube bearing seat arranged between the upper base plate and the support tube and rotatably sleeved outside the support column.

4. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 3 , wherein a first positioning block is arranged on the bottom tube bearing seat, a bottom portion of the support tube is insertedly fitted outside the first positioning block, and the first positioning block is drivingly fitted with the support tube.

5. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 4 , wherein a positioning edge is provided on a periphery of the bottom tube bearing seat, and a positioning groove is formed between the positioning edge and the first positioning block, and the bottom portion of the support tube is insertedly fitted into the positioning groove.

6. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 3 , wherein a second positioning block is rotatably disposed on an upper end of the support column, the second positioning block is disposed in the support tube, and is drivingly fitted to the support tube.

7. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 3 , wherein the support assembly further comprises a rotation locking mechanism, the rotation locking mechanism comprises a wrench that is rotatably fitted to a side of the bottom tube bearing seat, a locking ring that is fixedly sleeved to the support column, and a positioning pin fitted and connected with the wrench, a plurality of locking grooves are surroundingly arranged on the locking ring, and the positioning pin are insertedly fitted with a corresponding one of the locking grooves.

8. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 7 , wherein the locking ring is clamped between the upper base plate and the bottom pipe bearing seat, and a seal retaining ring is sleeved outside of the locking ring.

9. The sunshade umbrella with the hand-held portable rotatable base mechanism according to claim 1 , wherein the canopy assembly comprises a skeleton and a canopy arranged on the skeleton.