A spinner toy with operational autonomy from an outside energy source, increased duration of rotation, and improved entertainment qualities is described. A rotating element of a spinner toy is configured to be centrally balanced relative to a central axis of rotation and is equipped with a means of rotation in the form of a ball bearing and screw converter having a housing in the form of a hollow sleeve, which is capable of converting the reciprocating motion of a pusher of the means of rotation into unidirectional rotational motion without slowing the rotating element. The present method includes imparting rotation to the rotating element without interrupting the use of the spinner toy by a user by means of mechanically converting the reciprocating motion of the pusher of the means of rotation in the form of a ball bearing and screw converter into unidirectional rotational motion without slowing the rotating element.

A spinner toy with operational autonomy from an outside energy source, increased duration of rotation, and improved entertainment qualities is described. A rotating element of a spinner toy is configured to be centrally balanced relative to a central axis of rotation and is equipped with a means of rotation in the form of a ball bearing and screw converter having a housing in the form of a hollow sleeve, which is capable of converting the reciprocating motion of a pusher of the means of rotation into unidirectional rotational motion without slowing the rotating element. The present method includes imparting rotation to the rotating element without interrupting the use of the spinner toy by a user by means of mechanically converting the reciprocating motion of the pusher of the means of rotation in the form of a ball bearing and screw converter into unidirectional rotational motion without slowing the rotating element.

A toy assembly having a body symmetrically balanced around a first axis. The body has wheels upon which the body can roll. A flywheel is disposed within the body that rotates about the first axis in a plane that is perpendicular to said first axis. The flywheel preserves angular momentum. At least one gear is provided within the body that transfers rotational energy between the flywheel and at least one of the wheels. The toy assembly can roll as a vehicle or spin as a top depending on whether it is placed on a flat surface or balanced on a salient point.

A toy assembly having a body symmetrically balanced around a first axis. The body has wheels upon which the body can roll. A flywheel is disposed within the body that rotates about the first axis in a plane that is perpendicular to said first axis. The flywheel preserves angular momentum. At least one gear is provided within the body that transfers rotational energy between the flywheel and at least one of the wheels. The toy assembly can roll as a vehicle or spin as a top depending on whether it is placed on a flat surface or balanced on a salient point.

An self-standing balancing device comprises a supporting frame, a connecting rod, a motor, an inertia turntable, an inertia sensor, a balance controller and a motor driver. The supporting frame comprises a first end and a second end, and the first end is suspended, and the second end is located on a supporting surface. The connecting rod is located on the supporting frame, the connecting rod comprises a third end and a fourth end, and the third end is located on the supporting surface. The motor comprises a fixing base and a rotation axis, and the fourth end is fixed on the fixing base. The inertia turntable is fixed on the rotation axis of the motor.

A power unit for a toy or a system of toys that can removable receive the power unit. The power unit comprises a drive gear that can provide rotational power to one or more driven components of a toy with which the power unit is associated. The drive gear can comprise multiple drive portions. The toys can comprise a wide variety of toy types.

A power unit for a toy or a system of toys that can removable receive the power unit. The power unit comprises a drive gear that can provide rotational power to one or more driven components of a toy with which the power unit is associated. The drive gear can comprise multiple drive portions. The toys can comprise a wide variety of toy types.

A combined toy top comprises an upper top and a bottom top that are assembled together. The upper top and the bottom top both comprise a central axis body and a top ring fitting over the central axis body. The direction in which the top ring is installed on the central axis body can be turned over between a top face and a bottom face and, therefore, a combined toy top with a variety of assembly ways may be achieved by turning the direction of the top ring on the central axis body. As a result, more powerful attacks and a higher victory rate during games can be realized. Furthermore, a user may form tops of various shapes and centers of gravity by turning the direction of the top ring on the central axis body for adaption to different games and attacks.

A combined toy top comprises an upper top and a bottom top that are assembled together. The upper top and the bottom top both comprise a central axis body and a top ring fitting over the central axis body. The direction in which the top ring is installed on the central axis body can be turned over between a top face and a bottom face and, therefore, a combined toy top with a variety of assembly ways may be achieved by turning the direction of the top ring on the central axis body. As a result, more powerful attacks and a higher victory rate during games can be realized. Furthermore, a user may form tops of various shapes and centers of gravity by turning the direction of the top ring on the central axis body for adaption to different games and attacks.

In an example embodiment, a yoyo includes an axle, a first body and a second body coupled to the axle, and a string windable about the axle within a gap between the first body and the second body. The first body includes an outer rim and multiple propeller blades that extend inward from the outer rim toward the axle. The gap between the first body and the second body is smaller than three times a diameter of the string. A diameter of the axle is no larger than one sixth of the diameter of the first or second outer rim. An aggregate mass of the first and second outer rims is at least one quarter of an aggregate mass of the yoyo, string excluded.