An electric scooter is disclosed that includes a concaved-shaped center frame comprising a first and second curved members, a concaved-shaped rear frame hingebly attached to the center frame about a first axis, a front frame portion hingeably attached to the center frame about a second axis perpendicular to the first axis, and support cables coupled at a first end to the front frame portion and at a second end to the rear frame.

In an aspect, a compactable bicycle is provided, comprising a base frame portion and a steering structure, at least one of which has a first and a second frame element. Each frame element has a locking surface, an end, and an aperture. The frame elements are positionable in a first position wherein the first and second apertures are aligned and the locking surfaces face away from one another, and in a second position in which the apertures are unaligned. A plunger has first and second plunger locking surfaces and is movable to a clamping position where it extends in both the first and second apertures and engages the first frame element locking surfaces, and a release position wherein the plunger retracts from the second aperture sufficiently to permit the first and second ends to be separated from one another.

In an aspect, a compactable bicycle is provided, comprising a base frame portion and a steering structure, at least one of which has a first and a second frame element. Each frame element has a locking surface, an end, and an aperture. The frame elements are positionable in a first position wherein the first and second apertures are aligned and the locking surfaces face away from one another, and in a second position in which the apertures are unaligned. A plunger has first and second plunger locking surfaces and is movable to a clamping position where it extends in both the first and second apertures and engages the first frame element locking surfaces, and a release position wherein the plunger retracts from the second aperture sufficiently to permit the first and second ends to be separated from one another.

A lockable steering mechanism for a children's ride-on vehicle is provided. The steering mechanism has a steering shaft coupled to a steering link that is coupled to the vehicle's front wheels. A steering wheel is axially fixed to the steering shaft. A lifter guide is rotationally and axially fixed to the steering shaft, and a lifter is rotationally fixed to and axially moveable about the lifter guide. A rotatable locking ring rotates from a first position to a second position. The lifter engages the steering wheel when the locking ring is in the first position to rotationally fix the steering wheel to the steering shaft. The lifter is rotationally decoupled from the steering wheel when the locking ring is in a second position to rotationally decouple the steering wheel from the steering shaft.

A lockable steering mechanism for a children's ride-on vehicle is provided. The steering mechanism has a steering shaft coupled to a steering link that is coupled to the vehicle's front wheels. A steering wheel is axially fixed to the steering shaft. A lifter guide is rotationally and axially fixed to the steering shaft, and a lifter is rotationally fixed to and axially moveable about the lifter guide. A rotatable locking ring rotates from a first position to a second position. The lifter engages the steering wheel when the locking ring is in the first position to rotationally fix the steering wheel to the steering shaft. The lifter is rotationally decoupled from the steering wheel when the locking ring is in a second position to rotationally decouple the steering wheel from the steering shaft.

A quick assembly bicycle stem structure includes a front fork stem, a handlebar stem having a zigzag-shaped slot opening formed at a lower end thereof that is received in an upper section of the front fork stem, the zigzag-shaped slot opening including a first vertical slot and a second vertical slot that are spaced apart in relation to one another, a pin bolt coupled to the front fork stem and extending into the zigzag-shaped slot opening of the handlebar stem, the pin bolt configured to travel within the zigzag-shaped slot opening and to enter the second vertical slot from the first vertical slot when the front fork stem is rotated relative to the handlebar stem, and a nut assembly received over the handlebar stem and configured to threadedly engage the upper section of the front fork stem.

A quick assembly bicycle stem structure includes a front fork stem, a handlebar stem having a zigzag-shaped slot opening formed at a lower end thereof that is received in an upper section of the front fork stem, the zigzag-shaped slot opening including a first vertical slot and a second vertical slot that are spaced apart in relation to one another, a pin bolt coupled to the front fork stem and extending into the zigzag-shaped slot opening of the handlebar stem, the pin bolt configured to travel within the zigzag-shaped slot opening and to enter the second vertical slot from the first vertical slot when the front fork stem is rotated relative to the handlebar stem, and a nut assembly received over the handlebar stem and configured to threadedly engage the upper section of the front fork stem.

The invention relates to a handlebar stem, which permits simple and quick loosening and twisting, as well as simple and safe resetting and fastening of said stem with the handlebar attached thereto. The problem of the invention is to provide a particularly simple, theft-proof and versatile alternative involving low manufacturing costs, and which can also easily be retrofitted. A stem set according to the invention comprises a stem and at least one locking device, which can be fixedly clamped to the steerer tube. According to the invention, the stem set is arranged, such that when mounted on the steerer tube, the locking device fixedly connected to the steerer tube prevents the stem from being pulled off the steerer tube. However, this can also be achieved, for example, by the stem engaging around and/or behind the locking device and/or the locking device engaging around and/or behind the stem.

A dual-pedal driven scooter includes a frame having a front end and a rear end. Front wheels and a rear wheel that are connected to the frame at the front end and the rear end, respectively. A transmission mechanism is configured to drive the rear wheel to thereby drive the scooter. A pedal is configured to drive the scooter wherein. The transmission mechanism is provided with a transmission rope that links the pedal and the rear wheel. The pedal is fixedly connected to the transmission rope to thereby drive the rear wheel by pulling the transmission rope.

According to an aspect, there is provided a vehicle system that includes a foot-deck-based vehicle and a seat accessory structure. The foot-deck-based vehicle includes a foot deck, a handle structure and a plurality of wheels. The foot deck is positioned to support—a user and includes a first handle structure receiving feature. The handle structure is detachably connectable to the first handle structure receiving feature. The seat accessory structure has a seat body and is detachably connectable to the foot deck so as to form a seat-based vehicle. The seat accessory structure has a second handle structure receiving feature thereon. The handle structure is detachably connectable to the second handle structure receiving feature, so as to be positioned for gripping by a secondary person when the secondary person is urging the seat-based vehicle to roll on the ground surface while the user is seated on the seat body.