Hard disk driving carriage and method of producing the same

摘要

An object is to obtain a carriage for a hard disk driving actuator by a cheap cost in which an attaching intensity of the bearing can be sufficiently enhanced. Also, an object is to obtain a carriage plate in which it is possible to align a position for a plurality of carriage plates highly accurately with a high rigidity and a thin thickness and it is possible to enhance an attaching intensity to the bearing sufficiently. A carriage formed by a pressing operation by a press comprises a fixed bearing section, a fixed coil section, and an arm section. The thickness of the fixed bearing section is thicker than the thickness of the arm section and the fixed coil section. The rigidity in the arm section and the fixed coil section are higher than the rigidity in the fixed bearing section. It is acceptable if a plurality of longitudinal grooves which extend in an axial direction are formed on an inner wall of an attaching hole for the fixed bearing section so as to enhance the attaching accuracy of the bearing. An engaging protrusion or an engaging hole is formed near the fixed bearing section of the carriage plate so as to form the carriage by attaching the carriage plates by engaging these protrusions into the holes.