Abstract: A foldable bicycle includes a main frame, a front frame, a swingable middle frame, and a rear strut. The main frame includes a front casing, a middle pivoting member, and a rear pivoting member. The front frame is inserted into the front casing. The swingable middle frame includes an upper section, a middle section pivotally connected with the middle pivoting member, and a lower section including a guiding groove. The guiding groove includes first and second groove ends. The distance between the first groove end and the middle pivoting member is greater than that between the second groove end and the middle pivoting member. The rear strut includes a first end pivotally connected to the rear pivoting member and a second end connected to a slider. The slider is slidably received in the guiding groove and capable of being selectively moved between the first and second groove ends.

Abstract: A scooter structure includes a vertical frame and a pedal body. The bottom of the vertical frame connects to (a) front wheel(s). The rear end of the pedal body connects to (a) rear wheel(s), the front end of the pedal body connects to an auxiliary supporter. The auxiliary supporter includes a pivoting portion pivoted at the bottom of the vertical frame and an extension element located higher than that of the pivoting portion. The extension element connects to auxiliary wheels by an assembling component. The pedal body uses the pivoting portion as the rotation shaft, and is selectively rotated between an expansion position (the pedal body is away from the vertical frame and the rear wheel is on the ground) and a folded position (the pedal body is close to the vertical frame and the auxiliary wheels are on the ground) with respect to the vertical frame.