Patent ID: 8763576

Claim:
A rocker arm with a lash adjuster, comprising: a rocker arm body portion including a circular fitting hole, a large-diameter hole that is formed on a bottom side of the fitting hole and that has an inside diameter larger than that of the fitting hole, and a step portion at a boundary between the fitting hole and the large-diameter hole; a lash adjuster having a snap ring groove formed on an outer circumferential surface of the lash adjuster so as to extend in a circumferential direction, and a partially cut-out annular snap ring fitted to the snap ring groove, wherein once the lash adjuster is inserted in the fitting hole, the snap ring reduces in diameter against elastic force when the snap ring passes through the fitting hole while being fitted to the snap ring groove, the snap ring increases in diameter by elastic force when the snap ring reaches the large-diameter hole and hooks on the step portion while being fitted to the snap ring groove, and the snap ring prevents the lash adjuster from slipping off; and a diameter-reducing member that is a member engaged with the snap ring, that is assembled in the rocker arm body portion and that reduces the diameter of the snap ring by operation of the diameter-reducing member from an outside of the rocker arm body portion until the snap ring is not engaged with the step portion.