Patent ID: 7611166

Claim:
A locking structure of a steering column, comprising: a main housing that is disposed around a steering shaft and configured to be fixed to a car body; an insert pipe that protrudes backward from the main housing; a sliding housing that has an arc portion at least substantially surrounding the insert pipe, having a tightening block at each end, and having a variable inner cross-section that changes with changes in distance between the tightening blocks; an upper housing that is tiltable relative to the sliding housing; a tilt plate that is fixed to the upper housing, extends to a side of the tightening block of the sliding housing, and has an arc-shaped slot corresponding to a rotation distance of the tilt plate relative to the tightening block; a locking bolt that passes through the arc-shaped slot of the lilt plate and through the tightening blocks; an operation lever that is rotatably fitted on the locking bolt; and a cam assembly that variably applies a force to the tilt plates and the tightening blocks according to a rotation distance of the operation lever.