撚線サスペンションワイヤの構造設計手法の検討

抄録

Copper alloy suspension wires are used in optical pickups and image stabilization mechanisms of mobile cameras. The durability of the suspension wire used in mobile cameras is greatly affected by the increase in the weight of the lens part due to the high image quality of the camera. Therefore, there is a need to improve the durability of the wire. In this study, the stress reduction effect of the twisted wires suspension are investigated using finite element method (FEM) analysis. In addition, a practical equation is obtained to facilitate the structural design. From this study, and the following conclusions were obtained. In contrast to the conventional single–wire structure, the twisted wire structure enables a significant reduction in the stress generated while maintaining the stiffness. A simple formula that approximates the results of many FEM analyses was proposed. This enables rapid product design.