A dual-purpose folding table comprises a table board and two supporting frames. An upper portion of an outer leg pipe is pivotally connected to a rear portion of a side of the table board. A front portion of a bottom surface of the table board comprises a blocking portion corresponding to an inner leg pipe. The two supporting frames comprise a hook structure. The outer leg pipe is sleeved with a sliding sleeve located above a rotation point of the inner leg pipe and the outer leg pipe. A supporting rod is connected between a middle portion of the side of the table board and the sliding sleeve. Two ends of the supporting rod are pivotally connected to the sliding sleeve and the table board. The sliding sleeve is disposed with a locking member for locking the sliding sleeve to the outer leg pipe.

A dual-purpose folding table comprises a table board and two supporting frames. An upper portion of an outer leg pipe is pivotally connected to a rear portion of a side of the table board. A front portion of a bottom surface of the table board comprises a blocking portion corresponding to an inner leg pipe. The two supporting frames comprise a hook structure. The outer leg pipe is sleeved with a sliding sleeve located above a rotation point of the inner leg pipe and the outer leg pipe. A supporting rod is connected between a middle portion of the side of the table board and the sliding sleeve. Two ends of the supporting rod are pivotally connected to the sliding sleeve and the table board. The sliding sleeve is disposed with a locking member for locking the sliding sleeve to the outer leg pipe.

A blow-molded unitary structure includes a panel having upper and lower panel surfaces and a ridge extending downward beyond the lower panel surface. The ridge includes a first side surface, a second side surface, and a lower ridge surface joined with the first side and second side surfaces of the ridge. The ridge further includes a plurality of depressions formed at one or more of the first side surface, second side surface and lower ridge surface. The plurality of depressions enhances the strength of the ridge, and the ridge in turn enhances the strength of the structure.

The present disclosure discloses an automatic leveling control method for a four-leg support working platform, which comprises the steps: determining the mass center position of the working platform, determining the main bearing quadrant and distinguishing active legs from the driven leg; adjusting the driven leg to weak state, controlling all legs to synchronously actuate for leveling; calculating the limit compensating actuation length of the driven leg, and performing compensating actuation until accomplishing the leveling process. The method is advantageous in: high speed, high robustness, no repeated oscillation. The mass center always stays within the bearing zone of the active legs, thus completely eliminating capsizing risk of the working platform. The compensating actuation of the driven leg ensures there is no weak leg, and hence high attitude and load-bearing stability of the working platform is achieved.

The present disclosure discloses an automatic leveling control method for a four-leg support working platform, which comprises the steps: determining the mass center position of the working platform, determining the main bearing quadrant and distinguishing active legs from the driven leg; adjusting the driven leg to weak state, controlling all legs to synchronously actuate for leveling; calculating the limit compensating actuation length of the driven leg, and performing compensating actuation until accomplishing the leveling process. The method is advantageous in: high speed, high robustness, no repeated oscillation. The mass center always stays within the bearing zone of the active legs, thus completely eliminating capsizing risk of the working platform. The compensating actuation of the driven leg ensures there is no weak leg, and hence high attitude and load-bearing stability of the working platform is achieved.

A collapsible, adjustable height table with a compact folded configuration and a range limiter to secure selected table heights.

A collapsible, adjustable height table with a compact folded configuration and a range limiter to secure selected table heights.

A portable tray assembly includes a tray, a set of legs, a cup holder, and a slot. The tray has a lower surface and an upper surface. The leg assembly is coupled to the lower surface and has two sets of legs configured to pivot relative to one another and the tray for ease of storage. The cup holder passes through the tray and has a net configured to selectively collapse into the tray to permit functioning of the leg assembly. The slot extending down from the upper surface and including at least one hole.

Example electric solar canopy systems and methods are described. In one implementation, a foundation is positioned on a surface. A table is configured to secure multiple solar panels. A lifting mechanism is coupled to the foundation and the table, where the lifting mechanism is configured to move the table between a lowered position and a raised position.

A portable tabletop assembly includes a horizontal tabletop, first and second pairs of legs for supporting the tabletop on a horizontal surface, a first crossbeam, and a height lock. Each pair of legs includes a first leg and a second leg pivotably connected to one another. Each leg has a first leg end, and a second leg end slidably coupled to the tabletop. The first crossbeam connects the first leg of the first pair of legs to the first leg of the second pair of legs. The height lock is engageable at infinite positions between raised and storage positions to inhibit horizontal sliding of the first crossbeam and the second leg ends of the first legs to fix a height of the tabletop above the horizontal surface. A method of adjusting the height of a portable tabletop assembly is also disclosed.