Importance

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Abstract

A rotary-type electromagnetic actuator for a toy includes a cylindrical magnetic stator fixedly mounted within a housing, a rotor arranged concentrically within the stator and rotatably supported by a shaft within the housing, a coil wound on the rotor for causing the rotor to rotate back and forth by being energized and deenergized, a commutator fixedly secured to the shaft of the rotor for supplying current to the coil, a rotor position-correcting member turnably provided inside the housing in opposition to the commutator and in concentric relation with respect to the housing, and a pair of current feeding brushes embracing the commutator from both sides thereof, each of the current brushes having one end secured to the position-correcting member and another end in pressing contact with a respective commutator bar of the commutator. The coil is energized by dc power supplied through the brushes and commutator. When the rotor position-correcting member is turned, the brushes secured thereto cause the commutator, which is being embraced by the brushes, to rotate together with the rotor in the direction in which the position-correcting member is being turned, thereby setting the rotor home position, which prevails when the coil is in the deenergized state, to conform to the toy being operated.

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First Claim