Steering shaft locking device

Claim 1

A steering shaft locking device including a sleeve in which a steering shaft is rotatably accommodated, and a housing so that a lock member may be projectable for its engagement with said steering shaft in response to rotation of a rotary member of a cylinder lock with an axis of said sleeve intersecting with that of said housing, said steering shaft locking device comprising: a rotary ring formed with a boss portion, which is rotatably provided in said sleeve so as to enclose an outer circumference of said steering shaft at a position of projection of said lock member into and of its retraction from said sleeve; said boss portion being projected out of said sleeve; a spring for urging said rotary ring in the direction towards a regular angular position for unlocking said steering shaft; said boss portion and said spring being mounted on said rotary ring; and a wire connected, at one end thereof, with said boss portion and connected, at the other end, either with a seat whose top face is caused to selectively move downwards and upwards when a driver takes said seat and leaves said seat, respectively or with a door, etc. arranged to be opened and closed.