Patent ID: 8561586

Claim:
A rocker arm unit which constitutes a valve gear of an internal combustion engine, comprising: a plunger formed into a vertically elongated cylindrical shape and having an upper end formed with a hemispherically rounded support, the plunger having an outer circumferential surface formed with a stepped portion, the plunger including an upper part extending upward from the stepped portion and a lower part extending downward from the stepped portion, the upper part having a smaller diameter than the lower part such that the upper part is radially more slender than the lower part; a vertically extending bottomed cylindrical body and constituting a lash adjuster together with the plunger, the body accommodating the plunger so that the plunger is slidable; a rocker arm extending in a direction perpendicular to the vertical direction and having two ends in a direction of extension, the rocker arm having a bearing which is formed on one of the ends thereof and has a bearing surface formed into a concave spherical surface receiving the support, the rocker arm having a valve abutment which is formed on the other end thereof and is abutted against an upper end of a valve of the valve gear from above, the rocker arm being swung while an outer surface of the support is slid on the bearing surface of the bearing; and a clip which is configured to be fixed to an upper end of the body and is formed with a retainer having a retaining portion which is configured to be swaged onto an inner circumferential surface of the upper end of the body, the clip further having an extension extending integrally from the retainer, the extension having an upper end which is engaged with the rocker arm thereby to prevent the rocker arm from falling off the lash adjuster, the retaining portion being configured to abut against the stepped portion of the plunger from above thereby to prevent the plunger from coming off upwardly out of the body.