| 摘要 |
A rocker arm 1 includes an arm body 4 prepared from a single plate material by means of a press work. The arm body 4 includes a pair of parallel side walls 5 and a connecting wall 6 bridging between the opposite side walls 5 and also having a pivot support hole 7 defined at a location generally intermediate of the length of the arm body 4 . A roller support pin for rotatably supporting a roller 10 for driving engagement with a cam is mounted on one ends 1 a of the opposite side walls 5 , while the opposite end 1 b of the connecting wall 6 defines an overlapped structure 13 formed by bending an end overlap piece 12 , extending integrally from a side edge of the connecting wall 6 , backwardly to overlap the connecting wall 6 . This overlapped structure 13 in turn defines an adjustment element 16 having a mounting hole 15 defined therein for adjustably receiving a valve driving member 14 . The rocker arm 1 may be designed to be an end pivot type, in which case the adjustment element 16 is provided with a pivot member.
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