Patent ID: 7201390

Claim:
A scooter, comprising: a main body; a rear wheel mounted on a rear end of the main body; an operation mechanism mounted on the main body and connected to the rear wheel to move the rear wheel; wherein the operation mechanism includes a driving device detachably mounted on the main body to move the rear wheel; wherein the driving device includes: a first sprocket; two opposite pedals each having an end secured to the first socket to rotate the first sprocket; a second sprocket; a first chain meshing with the first sprocket and the second sprocket so that the second sprocket is rotated by the first sprocket; a first driving gear secured on and coaxial with the second sprocket to rotate therewith; a second driving gear rotatably mounted on the main body and meshing with the first driving gear; a third sprocket secured on and coaxial with the second driving near to rotate therewith; a fourth sprocket secured on and coaxial with the rear wheel to rotate the rear wheel; and a second chain meshing with the third socket and the fourth socket so that the fourth sprocket is rotated by the third sprocket.