Hand-push sunshade

A hand-push umbrella, comprising:

• a vertical column having a top;
• an upper nest operated by a movable ejector rod and capable of moving up and down along the column;
• a lower nest having a bottom and a top and being movably sleeved on the column;
• a plurality of long rods, each having an upper end mounted on the upper nest, an upper portion, a middle portion and a lower end;
• a canopy connected to the plurality of long rods;
• a plurality of first short rods, each having a lower end mounted on the lower nest, and an upper end hinged to the middle portion of the long rod;
• wherein,
• a first retainer ring is sleeved on the column above the lower nest, and the first retainer ring is fixed with the column and located at a position that limits upward movement of the lower nest when the canopy is in an open position;
• a handle is connected to the bottom of the lower nest, and a handle control mechanism, which is capable of locking and unlocking with the first retainer ring, is disposed inside the lower nest;
• the handle control mechanism comprises a second retainer ring and a sleeve with a top and a bottom, the handle is a circular tube having a top and a bottom and is movable and limitedly rotatably sleeved on the column, and the top of the handle is connected to the sleeve which is capable of rotating with the handle;
• the lower nest has an annular gap for receiving the first retainer ring at top of the lower nest, the second retainer ring is transversely movable and is disposed inside the lower nest located above the sleeve;
• the first retainer ring has an annular neck on the periphery of the first retainer ring, while the second retainer ring has a limiting protrusion capable of being blocked inside the annular neck protruding on the left side of the second retainer ring, the second retainer ring also has a locking block protruding diagonally opposite to the limiting protrusion;
• when the lower nest upward movement is limited by the first retainer ring, the limiting protrusion is located inside the annular neck and is blocked by the first retainer ring, so as to lock the canopy in an open position;
• the sleeve has a pushing protrusion for pushing the second retainer ring disposed on the top of the sleeve;
• when the sleeve rotates with the handle, the pushing protrusion rotates to the left side of the second retainer ring and is capable of pushing the locking block to force the second retainer ring move leftward, so as to make the limiting protrusion be detached from the annular neck of the first retainer ring, accordingly, the lower nest is unlocked with the first retainer ring and the canopy can be folded.