A four-set rotating shaft linkage mechanism automatically adjusts the clamping force, using rotating wheels to push the sliding column compression block to generate radial pressure. A 2024 patent shows that the hinged design of the lower positioning ring and the collar allows the support frame to automatically rise as the seedlings grow, achieving double locking with the adjusting tooth-positioning tooth meshing mechanism. A circular support base is installed at the bottom of the support tube, increasing the contact area by 40% compared to traditional structures, effectively preventing tilting caused by soil settlement.
In addition to the above structure, recent patents have also showcased various other design principles. The telescopic adjustable structure includes a telescopic support leg frame formed by the sliding connection of hollow cylinders, a seedling enclosure with spring rubber washers, and a ground anchor design for fixation and anti-theft. The structure with a rotating base and straps achieves angle adjustment by connecting the support rod to the rotating base, with L-shaped fixing strips and extension strips for fixation, and the trunk is secured by straps and support sleeves. The hoop mechanism, which moves with the sapling's growth, consists of two semicircular rings with an internal arc-shaped plate and sleeve. The support mechanism expands and contracts with the sapling through a locking tooth engaging a rectangular hole. A structure utilizing a ball-head swinging motion to reduce wind impact on the sapling reduces the impact of wind by allowing the ball head to swing within a spherical groove. It also includes an adjustable height design with an upper fixed rod and a sliding rod.
