| 摘要 |
A steering lock apparatus is provided that can protect a steering column 2e from damage, such as cracking, even when a steering wheel is forcibly rotated with the ignition key off. Protrusions 24 in the circumferential direction are provided at a plurality of locations in the axial direction of peripheral edge portions on both sides in the circumferential direction, which is a rotational direction of the steering wheel, of a peripheral edge of a lock through hole 16d. The protrusions 24 in the circumferential direction absorb the large force, that is applied to the peripheral edge portions of the lock through hole 16d in an attempt to rotate the steering wheel with the ignition key off by plastically deforming. |
| 主权项 |
1. A steering lock apparatus comprising:
a steering column; a key-lock collar supported by part of a steering shaft that is rotatably supported on an inside of the steering column, the key-lock collar having an engaging concave portion provided in at least one location in a circumferential direction of the steering column; a lock through hole formed in a portion on an outer circumferential surface of the steering column, a phase of the portion in an axial direction of the steering column being aligned with the key-lock collar; and a lock unit supported by the steering column with part located inside the lock through hole and having a lock pin that, with an ignition key turned off, substantially prevents rotation of the steering shaft on the inside of the steering column by displacing inward in a radial direction of the steering column causing a tip-end portion of the lock pin to engage with the engaging concave portion of the key-lock collar; wherein the lock through hole has a peripheral edge and the peripheral edge has sides in the circumferential direction, peripheral edge portions located on the sides, and protrusions that are provided at a plurality of locations of the sides, protrude in the circumferential direction, and are separated in the axial direction, such that, even when a force applied in an attempt to rotate the steering wheel is applied in a torsion direction of the steering column, the protrusions plastically deform according to a size of the force and the force is shared and supported by the protrusions to prevent stress concentration in part of the peripheral edge portions from occurring. |
