| 主权项 |
1. A steering device comprising:
a steering member; a steering shaft, to one end of which the steering member is coupled; a steering column including an outer tube and an inner tube that are fitted so as to be relatively slidable with respect to each other, the steering column supporting the steering shaft and being contractable upon a secondary collision; and a rotation restriction mechanism that restricts rotation of the inner tube, wherein: the outer tube includes a first opening; the inner tube includes a second opening, the second opening including a pair of rotation restricted edge portions that face each other in a circumferential direction and a driving edge portion that crosses the pair of rotation restricted edge portions; the rotation restriction mechanism includes
a support shaft, a position of which with respect to the outer tube is not varied upon the secondary collision,a restriction member supported on an outer periphery of the support shaft so as to be relatively rotatable, the restriction member being displaceable between an inserted position at which the restriction member is inserted into the second opening through the first opening and a retracted position at which the restriction member is retracted from the second opening, andan urging member that urges the restriction member toward the inserted position; the restriction member includes
a rotation restricting portion that engages with a corresponding one of the rotation restricted edge portions at the inserted position to restrict relative rotation between the outer tube and the inner tube, anda driven portion that engages with the driving edge portion upon the secondary collision; and the driving edge portion is configured to drive the restriction member toward the retracted position via the driven portion upon the secondary collision. |
