Patent 11143278 was granted and assigned to Nabtesco Corporation on October, 2021 by the United States Patent and Trademark Office.
An object of the present invention is to provide a steering assistance device that has a single line of final output, thereby to achieve downsizing. The assistance device of the present application includes a speed reducer configured to decelerate a driving force from a motor and output the decelerated driving force, wherein the speed reducer is configured to receive an operation force produced by an operation of a human.