Patent ID: 8555745

Claim:
A position adjustment device for a steering wheel comprising: a cylindrical outer column in which at least the inner diameter of a part in the axial direction can be expanded and contracted; a cylindrical inner column which is fitted and supported on the inner diameter side of this outer column so as to be capable of axial displacement; a steering shaft which is rotatably supported on the inner diameter side of this inner column, and which fixes a steering wheel on a rear end section thereof projecting to the rear side of a rear end opening section of this inner column; a pair of supporting plate sections which is provided on a support bracket supported on a vehicle body, in a state of sandwiching, from widthwise both sides, a portion of the outer column where the inner diameter can be expanded and contracted; a rod-shaped member arranged in the widthwise direction which is inserted through first through holes formed in positions of both of the support plates which align with each other, and through second through holes formed in portions of a part of the outer column and do not interfere with the inner column, and which, as it rotates, increases or reduces the distance between mutually opposing surfaces of both the support plates; and an adjustment lever, a base end section of which is joined and fixed on this rod-shaped member in order to rotate this rod-shaped member, the device further comprising: a support shaft, in a state of being arranged parallel with the rod-shaped member, supported on part of the outer column; and a telescoping locking eccentric cam, a base section of which is supported on an intermediate section of this support shaft; a portion of the telescoping locking eccentric cam, which opposes to an outer circumferential surface of the inner column or to a surface of a member fixed on this inner column, being of a telescoping locking convex arc edge in which the distance from the center of the support shaft becomes greater with approach to the rear side, a telescoping locking serrated section being formed on this telescoping locking convex arc edge, a spring being provided between the adjustment lever and the support shaft, and the spring allowing, as this adjustment lever being swing displaced from a state of adjusting the position of the steering wheel to a state of fixing it, for giving the support shaft an elastic force in a direction of pressing the telescoping locking serrated section against the outer circumferential surface of the inner column, or against the surface of a member fixed on the inner column.