Patent ID: 7338382

Claim:
A telescopic shaft for vehicle steering which is assembled in a steering shaft of a vehicle and in which a male shaft and a female shaft are fitted for relative telescopic movement and for torque transmission therebetween, characterized in that: a respective cylindrical member is disposed in at least one first set of accommodating portions being formed by a first pair of axially extending grooves formed respectively on an outer peripheral surface of said male shaft and on an inner peripheral surface of said female shaft, said cylindrical member having an axis that extends along an axial direction of said telescopic shaft, and said cylindrical member gradually decreasing in outer diameter from a central portion toward each of its end portions along the axial direction; and a respective rolling member is disposed in at least one second set of accommodating portions being formed by a second pair of axially extending grooves formed respectively on the outer peripheral surface of said male shaft and on the inner peripheral surface of said female shaft, said rolling member being radially biased.