Patent ID: 6932040

Claim:
A sheet-metal rocker arm formed by punching one sheet of sheet metal to form a blank having a specified shape and through holes, and by performing a bending process for this blank based on a press process, and comprising a pair of nearly parallel side wall sections each having an edge in the width direction and a connection section that connects the edges in the width direction of both of these side wall sections, and the side wall sections having at least one pair of circular holes formed at corresponding locations in alignment, and the connection section having an engagement section formed on one surface thereof by deforming in the thickness direction the middle of the connection section, such that it is more concave than the other surface of the connection section, and a bulge section provided on the other surface thereof by being protruded in an embanked shape as this engagement section is formed, the bulge section having a trapezoidal cross-section, wherein the center section of the bulge section, which corresponds to the top surface of the trapezoid, has bo th edges in the width direction located further inside in the width direction than both edges in the width direction of the engagement section.