The present invention comprises two or more rotatable three-dimensional bodies and a linkage between the bodies. By means of the linkage, the rotation of a first body causes a second body to rotate. In at least one of the rotational positions of the two or more bodies, the shapes of the bodies are designed to create a shaped cavity between a first body and a second body. The shaped cavity may be a tunnel, or the shaped cavity may be a recess or niche. As the at least two bodies are rotated, the shaped cavity may appear or disappear or may change shape, position, or orientation as the bodies are rotated.

A figure system includes a drive unit and a figure. The drive unit includes a plurality of first actuators. The figure includes a plurality of joints. The joints have one or more axial joint mechanisms. Drive force derived from at least one of the first actuators is transmitted to corresponding at least one of the axial joint mechanisms through a wire. The drive unit includes, as the plurality of first actuators, a plurality of servomotors having respective drive shafts. The figure includes coupler members having respective bearing holes. The bearing holes are detachably coupled to the respective drive shafts of the servomotors, or configured to be detachably coupled to the respective drive shafts of the servomotors. The wire has a first end coupled to corresponding one of the axial joint mechanisms, and a second end coupled to corresponding one of the coupler members.

A figure system includes a drive unit and a figure. The drive unit includes a plurality of first actuators. The figure includes a plurality of joints. The joints have one or more axial joint mechanisms. Drive force derived from at least one of the first actuators is transmitted to corresponding at least one of the axial joint mechanisms through a wire. The drive unit includes, as the plurality of first actuators, a plurality of servomotors having respective drive shafts. The figure includes coupler members having respective bearing holes. The bearing holes are detachably coupled to the respective drive shafts of the servomotors, or configured to be detachably coupled to the respective drive shafts of the servomotors. The wire has a first end coupled to corresponding one of the axial joint mechanisms, and a second end coupled to corresponding one of the coupler members.

A self-propelled toy glider includes a flexible frame and a flight surface. The flexible frame may be deformed and held within the user's hand. When deformed, the flexible frame stores spring energy. This spring energy is subsequently used to propel the self-propelled toy glider forward as it returns to original shape.

A self-propelled toy glider includes a flexible frame and a flight surface. The flexible frame may be deformed and held within the user's hand. When deformed, the flexible frame stores spring energy. This spring energy is subsequently used to propel the self-propelled toy glider forward as it returns to original shape.

A propulsion apparatus using sound radiation force according to an exemplary embodiment of the present invention includes: an ultrasound generation unit which is installed at one side of an object to be operated, generates ultrasound, and provides propulsive force to the object to be operated by using sound radiation force of the ultrasound; and an ultrasound control unit which is coupled to one side of the ultrasound generation unit, and increases propulsive force to be provided to the object to be operated by controlling intensity of the ultrasound generated by the ultrasound generation unit.

The present invention relates to a shooting-type toy, which develops from a first form to a second form when a projectile moved from the outside is inserted therein, and operates such that the inserted projectile is loaded and shot from the second from.

A toy is disclosed for a segmented tube track kit. The toy comprises a tube, comprised of reversibly attachable tubes. In one embodiment, the tube segments are held together frictionally. In another embodiment, tube segments are held together by locking mechanisms consisting of projections and cutouts. The toy vehicle in the kit has a drive wheel which is forced up away from the body of the car and against the inner walls of the tube by resilient members. In another embodiment, the vehicle has a tumbler wheel at the front of the car.

A toy is disclosed for a segmented tube track kit. The toy comprises a tube, comprised of reversibly attachable tubes. In one embodiment, the tube segments are held together frictionally. In another embodiment, tube segments are held together by locking mechanisms consisting of projections and cutouts. The toy vehicle in the kit has a drive wheel which is forced up away from the body of the car and against the inner walls of the tube by resilient members. In another embodiment, the vehicle has a tumbler wheel at the front of the car.

A toy vehicle with a selectively engageable gear assembly is disclosed. The gear assembly may be selectively placed in a drive position in which a first set of wheels and a second set of wheels are connected to the motor through a first gear train and a second gear train, respectively. The gear assembly may be selectively placed in a freewheel position in which the first set and second set of wheels are disconnected from the motor. The gear assembly is switched from the drive position to the freewheel position using a lever that pivots to move a gear in the first gear train to disconnect the gear and break the first gear train when a gear is moved in the second gear train to disconnect the gear and break the second gear train. Through the lever, the first and second gear trains are positioned in concert.