Electric scooter

An electric scooter of standing-sitting drive comprises;

• a front wheel assembly, a handlebar assembly, a handlebar stem assembly, a deck frame assembly with a seat assembly, a rear wheel assembly, and a parking assembly, and
• said front wheel assembly contains a front wheel with a hand brake device, a front wheel electric drive only for starting and going uphill, a fork arm with a fork arm shaft, and a head tube with a back beam, and
• said handlebar assembly contains a handlebar with a hand accelerator and a hand brake lever, and;
• said handlebar stem assembly contains an upper handlebar stem, a lower handlebar stem, a clamp, a folding joint, a tilting joint, and a holding clamp, and said upper handlebar stem has its upper end supporting the handlebar, and said clamp mounts on the upper end of the lower handlebar stem and engages with the lower end of the upper handlebar stem for height adjustment of said handlebar assembly, and
• said folding joint is located at the lower end of the handlebar stem assembly and has a folding hinge located at its rear side, hinging on the upper end of said fork arm shaft, and a folding latch at its front side connecting to the fork arm shaft, and
• said tilting joint connects its upper side to the lower end of the lower handlebar stem, and its lower rear side has a tilting hinge to hinge on the upper rear side of said folding joint, above said folding hinge, enabling to tilt said lower handlebar stem rearward and lock in selected positions, and
• said holding clamp mounts on the back beam of said head tube to hold the lower handlebar stem in a folded position, and
• said deck frame assembly contains a deck frame and a pair of deck plates, and said deck frame connects its front end to the back beam of the front wheel assembly, and said deck plates mount on the top of the deck frame, working as a standing deck for standing drive, and
• said seat assembly mounts on the deck frame and contains a seat of a flat plate supported by a pair of parallel posts, and the seat has two positions, one resting on the deck plates to work as a front part of the standing deck for standing drive, and another as a seat for sitting drive, and
• the pair of parallel posts consists of a front post and a rear post, and is placed in a longitudinal space in the middle of the deck frame, and when the seat rests on the deck plates, both parallel posts are horizontal with the front post positioned below the rear post, and have their front ends rear ends individually hinged on the seat with brackets and their rear ends hinged on the deck frame, and
• a vertical locking device to automatically lock the seat in the sitting drive position, as the parallel posts rise to the vertical position, and
• a horizontal locking device to automatically lock the seat on the deck plates for the standing drive, as the parallel posts tilt down to the horizontal position, and
• said rear wheel assembly contains an electric-driven rear wheel, a rear fork arm, and a pair of shock absorbers, and both rear fork arm and shock absorbers individually connect to the rear end of the deck frame, and
• said parking assembly consists of a dolly wheel assembly and a locking device, and the dolly wheel assembly consists of a pair of dolly wheels, a pair of dolly arms, and a laterally-laid shaft, and the dolly wheels individually hinge on the lower ends of the dolly arms, and the upper ends of the dolly arms individually secure to ends of the shaft, and the shaft is located behind the rear wheel and hinges on a pair of tail beams of the deck frame, and
• said locking device mounts on an inner side of the left tall beam and locks the dolly arms at the vertical position to park the scooter, and with the lower handlebar stem in the folded position and the seat positioned on the deck plates, the scooter can be rolled away by hand pulling on a handle mounted on the head tube of the front wheel assembly and vertically stand using the tail beams and dolly wheels to engage with the ground, and by releasing the locking device, the dolly arms will be raised forward and locked at a stored position, setting the scooter in the driving position.