A vehicle propellable by a human comprising a front assembly having a front wheel and a pair of hand pedals connect thereto; a rear assembly having a first rear wheel and a second rear wheel rotatably connected thereto; a chest rest located between the front assembly and the rear assembly, the chest rest configured to support the chest of a rider lying forward on the vehicle; and a first foot support structure operatively coupled to rotate the first rear wheel, and a second foot support operatively coupled to rotate the second rear wheel wherein the first rear wheel and second rear wheel are independently rotated by opposite feet of a rider when said feet are within said first and second foot support, respectively.

The invention pertains to a bicycle with variable wheelbase which converts the user's body expansion and contraction into propulsion. The invention comprises a frame [1] having a front wheel, and a structure [2] having a rear hub [4]. The structure [2] is suspended pivotally to the frame [1] about a rotational axis [3]. The wheelbase is varied by pivoting the structure [2] about the rotational axis [3]. By pivoting the structure [2], the catching wheels [7] and [8], both connected to the rear hub [4], travel along the retainer [5] and [6], respectively, and transmit torque to the rear hub [4] in one direction.

The invention pertains to a bicycle with variable wheelbase which converts the user's body expansion and contraction into propulsion. The invention comprises a frame [1] having a front wheel, and a structure [2] having a rear hub [4]. The structure [2] is suspended pivotally to the frame [1] about a rotational axis [3]. The wheelbase is varied by pivoting the structure [2] about the rotational axis [3]. By pivoting the structure [2], the catching wheels [7] and [8], both connected to the rear hub [4], travel along the retainer [5] and [6], respectively, and transmit torque to the rear hub [4] in one direction.

A vehicle propellable by a human comprising a front assembly having a front wheel and a pair of hand pedals connect thereto; a rear assembly having a first rear wheel and a second rear wheel rotatably connected thereto; a chest rest located between the front assembly and the rear assembly, the chest rest configured to support the chest of a rider lying forward on the vehicle; and a first foot support structure operatively coupled to rotate the first rear wheel, and a second foot support operatively coupled to rotate the second rear wheel wherein the first rear wheel and second rear wheel are independently rotated by opposite feet of a rider when said feet are within said first and second foot support, respectively.

A scooter includes a connecting seat and a connecting bar extending rearward of the connecting seat, at least one rotatable front wheel and at least one rear wheel; a handle bar to control turning of front wheel; and a foot pedal connected to the connecting bar, the foot pedal having a left foot pedal portion and a right foot pedal portion; each of the left and right foot pedal portions being configured to support a rider's left foot and right foot, respectively, to lie substantially parallel to the connecting bar. The front wheel has a diameter, and the front and rear wheels are spaced apart a lateral distance, and wherein a ratio of the diameter to the lateral distance is selected to allow a rider to propel the scooter along flat ground without pushing the feet along the ground. The front wheel may have a rounded shape as seen from front view to establish substantially tangential line contact with a rolling surface. The pedal defines a support surface for the rider's feet, and the support surface may be positioned above a plane connecting a rotation axis of the front wheel and a rotation axis of the rear wheel.

A scooter includes a connecting seat and a connecting bar extending rearward of the connecting seat, at least one rotatable front wheel and at least one rear wheel; a handle bar to control turning of front wheel; and a foot pedal connected to the connecting bar, the foot pedal having a left foot pedal portion and a right foot pedal portion; each of the left and right foot pedal portions being configured to support a rider's left foot and right foot, respectively, to lie substantially parallel to the connecting bar. The front wheel has a diameter, and the front and rear wheels are spaced apart a lateral distance, and wherein a ratio of the diameter to the lateral distance is selected to allow a rider to propel the scooter along flat ground without pushing the feet along the ground. The front wheel may have a rounded shape as seen from front view to establish substantially tangential line contact with a rolling surface. The pedal defines a support surface for the rider's feet, and the support surface may be positioned above a plane connecting a rotation axis of the front wheel and a rotation axis of the rear wheel.

Proposed is a wheeled vehicle comprising a frame (2), at least one driving wheel (3) mounted on the frame (2) and swinging pressure levers (5) mounted on the frame (2), and connected to the driving wheel (3) by linkages (12), wherein the swinging pressure lever (5) is a two-arm lever, the first arm (6) of which is designed to apply a muscular force thereto, and a two-arm driving lever (8) is rotatably mounted on the second arm (7), wherein the linkage (12) is connected by the first arm (11) of the driving lever (8) on the first end thereof, and on the second end (28) thereof it is connected to a linkage (12) reset element (30) via a movable sleeve mounted on a shaft (14) of the driving wheel (3) and rotatable in one direction, and the second arm (15) of the driving lever (8) is connected to a driving lever (8) takeup unit.

Proposed is a wheeled vehicle comprising a frame (2), at least one driving wheel (3) mounted on the frame (2) and swinging pressure levers (5) mounted on the frame (2), and connected to the driving wheel (3) by linkages (12), wherein the swinging pressure lever (5) is a two-arm lever, the first arm (6) of which is designed to apply a muscular force thereto, and a two-arm driving lever (8) is rotatably mounted on the second arm (7), wherein the linkage (12) is connected by the first arm (11) of the driving lever (8) on the first end thereof, and on the second end (28) thereof it is connected to a linkage (12) reset element (30) via a movable sleeve mounted on a shaft (14) of the driving wheel (3) and rotatable in one direction, and the second arm (15) of the driving lever (8) is connected to a driving lever (8) takeup unit.

A toy vehicle for children, comprising a vehicle frame, a steering rod, and a front wheel component provided at the bottom of the steering rod. The vehicle frame comprises a main vehicle frame provided with a seat mechanism, a left side frame with a left rear wheel assembly, and a right frame with a right rear wheel assembly. The left side frame and the right side frame respectively are rotatably connected to the rear of the main vehicle frame. The vehicle frame is further provided with a driving mechanism used for driving the left side frame and the right side frame to rotate respectively relative to the main vehicle frame so as to allow the left rear wheel assembly and the right rear wheel assembly to approach or to move away from each other, and an operating mechanism used for driving the movement of the driving mechanism.

A toy vehicle for children, comprising a vehicle frame, a steering rod, and a front wheel component provided at the bottom of the steering rod. The vehicle frame comprises a main vehicle frame provided with a seat mechanism, a left side frame with a left rear wheel assembly, and a right frame with a right rear wheel assembly. The left side frame and the right side frame respectively are rotatably connected to the rear of the main vehicle frame. The vehicle frame is further provided with a driving mechanism used for driving the left side frame and the right side frame to rotate respectively relative to the main vehicle frame so as to allow the left rear wheel assembly and the right rear wheel assembly to approach or to move away from each other, and an operating mechanism used for driving the movement of the driving mechanism.