| 摘要 |
PURPOSE:To improve productivity by uniting parts of the objective lens holder Assy of an actuator and reducing adhesive parts. CONSTITUTION:Yoke insertion parts 7-70 and 7-71 in a recessed groove shape are formed in flanks of an objective lens holder 7-26 in a quadrangular prism shape in parallel to an optical axis m-m. Focusing coil winding parts 7-27 and 7-35 are formed in a bobbin shape by forming a recessed groove with depth DELTA corresponding to the number of turns of focusing coil in four surfaces of the quadrangular prism. A suspension leaf spring fixing part 7-51 is formed in a flank difference from the flanks of said yoke insertion parts in level with upper and lower surfaces 7-31 and 7-32 of said recessed grooves. Then, 7-60 is the insertion part for an objective lens 7-1. Therefore, there are only three parts, i.e. the objective lens 7-1, the lens holder 7-26, and a balance weight 7-14 and only the balance weight 7-14 is adhered. |
