| 摘要 |
PROBLEM TO BE SOLVED: To increase a high-order resonance frequency without decreasing rigidity. SOLUTION: A lens holding part 9 which holds an objective, a bearing part 10 which is arranged at the center part of a support shaft fixed to the optical pickup device while supported rotatably and slidably, and a coil arrangement part 11 which is formed in a cylindrical shape around the bearing part 10 and provided with a driving coil on its outer peripheral surface are formed in a thin shape. The lens holding part 9, bearing part 10, and coil arrangement part 11 are coupled with one another by a linear and thin reinforcing rib 12. |
