Cantilever Umbrella with a Duo-Arc-In-Sliding-Sleeve Configuration

An outdoor umbrella, comprising a spine connected at its distal end to a canopy frame and at its proximal end to a tube support, said tube support comprising a mounting base, an inner vertical pipe, an outer vertical pipe and a locking structure, wherein said inner vertical pipe is fixedly attached to a top of said mounting base, said outer vertical pipe is fixedly attached to said spine and sleeving over an outer surface of said inner vertical pipe, and said locking structure disposed between said inner vertical pipe and said outer vertical pipe, said spine comprising a straight column affixed at its proximal end to said outer vertical pipe and said outdoor umbrella is a Roman umbrella;

• wherein said locking structure comprises a fluted disk comprising toothed grooves, a rotating sleeve piece and a locking assembly, said fluted disk affixed to a top of said inner vertical pipe, said rotating sleeve piece affixed to said outer vertical pipe and rotating in cooperation with said fluted disk, and said locking assembly disposed on said outer vertical pipe and capable of locking and unlocking said outer vertical pipe as parts of said locking assembly insert into or disengage from toothed grooves of said fluted disk, thereby effecting 360 degrees of rotation and locking at any of those degrees of said outer vertical pipe therefore said spine and said canopy relative to said inner vertical pipe;
• and
• wherein said mounting base comprises a counterweight seat and two elongated pieces installed therein, said counterweight seat comprises at least two counterweight blocks configured to have, in opposing side faces, accommodating housing grooves such that when said two counterweight blocks are closed together, a housing cavity is formed between said two counterweight blocks, wherein said two elongated pieces are arranged in the housing cavity in an intersecting fashion.

An outdoor umbrella, comprising a spine connected at its distal end to a canopy frame and at its proximal end to a tube support, said tube support comprising a mounting base, an inner vertical pipe, an outer vertical pipe and a locking structure, wherein said inner vertical pipe is fixedly attached to a top of said mounting base, said outer vertical pipe is fixedly attached to said spine and sleeving over an outer surface of said inner vertical pipe, and said locking structure disposed between said inner vertical pipe and said outer vertical pipe, said spine comprising a straight column affixed at its proximal end to said outer vertical pipe and said outdoor umbrella is a Roman umbrella;

• wherein said locking structure comprises a fluted disk comprising toothed grooves, a rotating sleeve piece and a locking assembly, said fluted disk affixed to a top of said inner vertical pipe, said rotating sleeve piece affixed to said outer vertical pipe and rotating in cooperation with said fluted disk, and said locking assembly disposed on said outer vertical pipe and capable of locking and unlocking said outer vertical pipe as parts of said locking assembly insert into or disengage from toothed grooves of said fluted disk, thereby effecting 360 degrees of rotation and locking at any of those degrees of said outer vertical pipe therefore said spine and said canopy relative to said inner vertical pipe;
• further characterized as:
• said locking assembly comprises a fixed sleeve seat and a wrench, wherein:
• said fixed sleeve seat is affixed to said outer vertical pipe, a first receding groove and a second receding groove which are in communication with each other are provided in said fixed sleeve seat and said outer vertical pipe, respectively;
• said wrench is rotatably connected to said fixed sleeve seat, and a locking piece is arranged at an inner end of said wrench, said locking piece passing through said first receding groove and said second receding groove, and extending into an inner cavity of said outer vertical pipe;
• and a locking groove that mates with the grooved teeth of said fluted disk is provided in an outer end of said locking piece;
• and
• wherein said wrench is configured with, in its rotating end, a mounting groove, a second torsion spring is embedded in an inner wall of said mounting groove with an inner end of the second torsion spring affixed to said inner wall of said mounting groove, and an outer end of said second torsion spring abutting against an outer vertical face of said fixed sleeve seat.