STEERING COLUMN FOR VEHICLE, PROVIDED WITH AXIALY ADJUSTABLE STEERING SHAFT

摘要

PURPOSE: To achieve shape-coupling engagement between teeth even in a position wherein tooth tops collide with each other by a method wherein a lock member is arranged at sections arranged in a state axially displaced by a half pitch and the distance space away in the axial direction from a jacket barrel for a tooth coincides with a value an even number times the pitch of a tooth. CONSTITUTION: In a position indicating a limit, the tooth 9 of one lock member 6 is situated in the gear tooth in the toothed gear segment 4 of the jacket barrel 1 and a position where tooth tops collide with each other. However, by displacing two toothed gear segments 4 and 5 in the axial direction by a half-pitch, the gear tooth 10 of other lock member 7 is at least partially engaged with the engagement part of the segment 5. Reversely, a gear tooth 9 is engaged with the engagement part of the segment 4 when the gear tooth 10 and the segment 5 are situated in a position where the gear tops collide with each other. As a result, locking of the teeth to realize shape-coupling engagement is always achieved.