Patent ID: 7779803

Claim:
A rocker arm installed module comprising: a housing disposed in a cylinder head in which engine valves are arranged slidably; a cam shaft supported rotatably relative to the housing; a rocker arm for opening and closing the engine valve by receiving a rotation of a cam provided on the cam shaft and rocking; and a pivot which is fixed to the housing and supports an end of the rocker arm slidably while forming a rocking support point of the rocker arm, wherein the housing includes a drop-off preventing means for supporting the rocker arm not to drop off from the pivot, and the drop-off preventing means is disposed at a lower position than a rocking range when the rocker arm is actuated, and the rocker arm is disposed among the cam of the cam shaft, the pivot and the drop-off preventing means in the housing to form a module, the module being configured to be disposed in the cylinder head while the rocker arm is prevented from dropping off.