Patent attributes
A stationary tooth row is provided in a restricted member that is not displaced together with a steering wheel during tilt adjustment of a steering system. A movable tooth row is provided in a movable member that is displaced in a tilt direction) together with the steering wheel during tilt adjustment. The movable tooth row includes a first movable tooth and second movable teeth. A first curvature radius of a tooth tip of the first movable tooth is made smaller than a second curvature radius of a tooth tip of each of the second movable teeth to make a tooth depth of the first movable tooth greater than a tooth depth of each of the second movable teeth.