A multidirectional support device is configured to move upon a traversed surface and includes a base. A multiaxial mobility element is attached to the base and includes main and secondary rolling elements having a main rolling axis and a secondary rolling axis The main rolling element is configured to allow rolling about the main rolling axis, and the secondary rolling element is configured to allow rolling about the secondary rolling axis. The multiaxial mobility element is arranged to support the base in a first stabilized equilibrium when the base is moving on the traversed surface and supported by the multiaxial mobility element. A controlled-mobility element is configured for controlled mobility and attached to the base. In the first stabilized equilibrium, the controlled-mobility element does not impede multidirectional movement of the device; and in a second stabilized equilibrium, the controlled-mobility element engages the traversed surface, impeding the multidirectional movement.

A multidirectional support device is configured to move upon a traversed surface and includes a base. A multiaxial mobility element is attached to the base and includes main and secondary rolling elements having a main rolling axis and a secondary rolling axis The main rolling element is configured to allow rolling about the main rolling axis, and the secondary rolling element is configured to allow rolling about the secondary rolling axis. The multiaxial mobility element is arranged to support the base in a first stabilized equilibrium when the base is moving on the traversed surface and supported by the multiaxial mobility element. A controlled-mobility element is configured for controlled mobility and attached to the base. In the first stabilized equilibrium, the controlled-mobility element does not impede multidirectional movement of the device; and in a second stabilized equilibrium, the controlled-mobility element engages the traversed surface, impeding the multidirectional movement.

A spring lock for a skate wheel includes a housing including opposite first and second holes, and a third hole; a pin through the first and second holes and including first and second grooves; a button on the third hole; a back plate on a back of the housing; a first biasing member secured to the back plate; a stop member secured to the first groove; a sliding member having one end urging against the first biasing member and the other end contacting the button to slidably dispose on the second groove, the sliding member including small and large holes; and a second biasing member on the pin and having one end urging against an inner surface of the housing and the other end urging against the stop member. In a locked state, the pin extends into an elongated hole of between two spokes of the wheel.

A spring lock for a skate wheel includes a housing including opposite first and second holes, and a third hole; a pin through the first and second holes and including first and second grooves; a button on the third hole; a back plate on a back of the housing; a first biasing member secured to the back plate; a stop member secured to the first groove; a sliding member having one end urging against the first biasing member and the other end contacting the button to slidably dispose on the second groove, the sliding member including small and large holes; and a second biasing member on the pin and having one end urging against an inner surface of the housing and the other end urging against the stop member. In a locked state, the pin extends into an elongated hole of between two spokes of the wheel.

A detachable roller skating structure includes a framework, a locking mechanism, and a tumbler switch. The framework is provided with a receiving cavity, the locking mechanism is disposed in the receiving cavity, the locking mechanism includes two buckles and a driving assembly located between the two buckles, the driving assembly is linked to the tumbler switch on an outer side of the framework, and a limiting lock is disposed on the tumbler switch. According to the present application, the roller skating structure can be more conveniently detached from or mounted onto a sole of a regular shoe, achieving free change between the regular shoe and the roller skate. In addition, the self-locking of the roller skating structure is achieved by the arrangement of the limiting lock, and the use safety of the roller skates is improved.

An electric roller skate system includes a pair of roller skates, where each of the pair of roller skates includes: a base configured to receive a foot of a rider, where the base comprises a front base and a rear base, where a distance between the front base and the rear base is adjustable; a front main body attached to the front base; a rear main body attached to the rear base; an ankle strap attached to the rear main body; two front wheels attached to a bottom of the front base; a rear wheel attached to a bottom of the rear base, where a cross-section of the rear wheel has a barrel shape; a battery; and an electric motor mechanically coupled to the rear wheel.

An electric roller skate system includes a pair of roller skates, where each of the pair of roller skates includes: a base configured to receive a foot of a rider, where the base comprises a front base and a rear base, where a distance between the front base and the rear base is adjustable; a front main body attached to the front base; a rear main body attached to the rear base; an ankle strap attached to the rear main body; two front wheels attached to a bottom of the front base; a rear wheel attached to a bottom of the rear base, where a cross-section of the rear wheel has a barrel shape; a battery; and an electric motor mechanically coupled to the rear wheel.