A canopy support structure includes first and second hubs coupled to and movable along the pole or first and second hubs of which one is coupled to and movable along a track. The first and second hubs are movable toward each other during extension of the canopy support structure and away from each other during retraction of the canopy support structure. A plurality of articulating arms is connected directly or indirectly to the first and second hubs. The articulating arms include sets of scissor-connected primary articulating arms. At least some of the sets of scissor-connected primary articulating arms are connected directly to the first and second hubs and extend outward from the first and secondary hubs during expansion of the canopy support structure.

A canopy support structure includes first and second hubs coupled to and movable along the pole or first and second hubs of which one is coupled to and movable along a track. The first and second hubs are movable toward each other during extension of the canopy support structure and away from each other during retraction of the canopy support structure. A plurality of articulating arms is connected directly or indirectly to the first and second hubs. The articulating arms include sets of scissor-connected primary articulating arms. At least some of the sets of scissor-connected primary articulating arms are connected directly to the first and second hubs and extend outward from the first and secondary hubs during expansion of the canopy support structure.

A rotary open-close type sun umbrella includes a standing post, umbrella ribs and umbrella cloths; an unfolding device is arranged at the upper end of the standing post, and the unfolding device is rotatably connected with the standing post; a plurality of umbrella ribs is arranged on the unfolding device, and the umbrella ribs are connected to umbrella cloths; each umbrella cloth is connected with two adjacent umbrella ribs, thus enabling the plurality of umbrella ribs and umbrella cloths to be sequentially connected to form an umbrella surface; the standing post is provided with a driving device, and the driving device is in transmission connection with the unfolding device, thereby allowing the umbrella surface to be unfolded or folded; the rotating arms are rotatably arranged on a mandrel; the mandrel propels one of the rotating arms and the corresponding umbrella rib to rotate.

A rotary open-close type sun umbrella includes a standing post, umbrella ribs and umbrella cloths; an unfolding device is arranged at the upper end of the standing post, and the unfolding device is rotatably connected with the standing post; a plurality of umbrella ribs is arranged on the unfolding device, and the umbrella ribs are connected to umbrella cloths; each umbrella cloth is connected with two adjacent umbrella ribs, thus enabling the plurality of umbrella ribs and umbrella cloths to be sequentially connected to form an umbrella surface; the standing post is provided with a driving device, and the driving device is in transmission connection with the unfolding device, thereby allowing the umbrella surface to be unfolded or folded; the rotating arms are rotatably arranged on a mandrel; the mandrel propels one of the rotating arms and the corresponding umbrella rib to rotate.

An umbrella includes a pole and upper pulley assembly, a lower hub assembly, and a rope. The pole has a base portion and a top end portion. The top end portion defines a through passage that extends entirely through the top end portion. The upper pulley assembly is disposed substantially within the through passage. The lower hub assembly is slidingly disposed about the pole such that the lower hub assembly has a first position in which the umbrella is in a closed configuration and a second position in which the umbrella is in an open configuration. The second position is above the first position. The rope extends through a lower pulley assembly and the upper pulley assembly. The rope is configured to translate the lower hub assembly from the first position to the second position and to maintain the lower hub assembly in the second position.

An umbrella includes a pole and upper pulley assembly, a lower hub assembly, and a rope. The pole has a base portion and a top end portion. The top end portion defines a through passage that extends entirely through the top end portion. The upper pulley assembly is disposed substantially within the through passage. The lower hub assembly is slidingly disposed about the pole such that the lower hub assembly has a first position in which the umbrella is in a closed configuration and a second position in which the umbrella is in an open configuration. The second position is above the first position. The rope extends through a lower pulley assembly and the upper pulley assembly. The rope is configured to translate the lower hub assembly from the first position to the second position and to maintain the lower hub assembly in the second position.

A positioning mechanism of an umbrella comprises a stand; a sliding seat capable of sliding along a length of the stand and; a synchronous toothed belt connected to the stand. The stand has a groove on a periphery of the stand extending along the length of the stand, the synchronous toothed belt is disposed inside the groove; the sliding seat has a toothed block or pin capable of engaging with the synchronous toothed belt, a button is disposed on the sliding seat, a torsion spring is resisted to drive the button to push the toothed block or pin to engage with the synchronous toothed belt. The stand of the present invention can be machined in various way and can be in various shapes, and is novel in appearance, easy to machine, firm and stable in positioning, and low in cost.

A positioning mechanism of an umbrella comprises a stand; a sliding seat capable of sliding along a length of the stand and; a synchronous toothed belt connected to the stand. The stand has a groove on a periphery of the stand extending along the length of the stand, the synchronous toothed belt is disposed inside the groove; the sliding seat has a toothed block or pin capable of engaging with the synchronous toothed belt, a button is disposed on the sliding seat, a torsion spring is resisted to drive the button to push the toothed block or pin to engage with the synchronous toothed belt. The stand of the present invention can be machined in various way and can be in various shapes, and is novel in appearance, easy to machine, firm and stable in positioning, and low in cost.

The umbrella capable of being quickly assembled and disassembled comprises a column; a plurality of long rods; a plurality of short rods; an upper nest; a lower nest; a plurality of rod connectors; a plurality of connecting mechanisms. Each long rod has a first end which is detachably connected to the upper nest through one rod connector, and each short rod has a first end which is detachably connected to the lower nest through one rod connector and a second end which is detachably connected to the middle portion of the corresponding long rod through one connecting mechanism. The present invention is simple and reasonable in structure and easy to operate. During disassembling, it is only necessary to disassemble the elastic connecting pins from the connecting mechanisms, and the long rods and the short rods can be quickly disassembled from the nests without using any tool.

The umbrella capable of being quickly assembled and disassembled comprises a column; a plurality of long rods; a plurality of short rods; an upper nest; a lower nest; a plurality of rod connectors; a plurality of connecting mechanisms. Each long rod has a first end which is detachably connected to the upper nest through one rod connector, and each short rod has a first end which is detachably connected to the lower nest through one rod connector and a second end which is detachably connected to the middle portion of the corresponding long rod through one connecting mechanism. The present invention is simple and reasonable in structure and easy to operate. During disassembling, it is only necessary to disassemble the elastic connecting pins from the connecting mechanisms, and the long rods and the short rods can be quickly disassembled from the nests without using any tool.