| 主权项 |
1. A steering system comprising:
a steering column including an outer tube and an inner tube that are fitted to each other so as to be axially slidable relative to each other, and that support a steering shaft, the steering column being tiltable around a tilt center axis; a fixing bracket secured to a vehicle body and including a pair of side panels opposed to each other; a movable bracket including a pair of side panels fixed to the outer tube and opposed respectively to the side panels of the fixing bracket; a lock mechanism including a lock shaft inserted through insertion holes in the side panels of the fixing bracket and insertion holes in the side panels of the movable bracket, the lock mechanism locking the steering column by bringing each of the side panels of the fixing bracket into pressure contact with a corresponding one of the side panels of the movable bracket in accordance with a rotation operation of an operation lever, the operation lever being rotated with the lock shaft; and an urging member that urges the steering column in an upward tilt direction, wherein the lock mechanism further includes a first cam, which is fitted to the lock shaft so as to be rotatable with the lock shaft, and a second cam, which has a cam shape different from a cam shape of the first cam and that is fitted to the lock shaft so as to be rotatable with the lock shaft, wherein the urging member includes a locked portion, which is locked to the fixing bracket, and an abutting portion, which abuts on the second cam, and wherein, when the lock mechanism locks the steering column, the first cam pushes up the inner tube in the upward tilt direction through an opening in the outer tube and the second cam presses the urging member so that the urging member applies a pressing reaction force in the upward tilt direction to the second cam. |
