| 摘要 |
PROBLEM TO BE SOLVED: To obtain an objective lens driving device in which the sliding characteristic between a lens holder and a sliding shaft is made better and higher order resonance of the lens holder is prevented. SOLUTION: A lens holder 4 of an objective lens driving device 1 is formed by liquid crystal resin including carbon fibers to obtain high rigidity so as to prevent the occurrence of resonance. On the other hand, a sliding shaft to be inserted into a shaft hole 441 formed on the lens holder 4 is formed by a stainless steel base material whose outer peripheral surface is plated with nickel-phosphorus with dispersed PTFE. Thus, the plated layer has a higher hardness, is superior in lubricity and therefore, the layer has a high sliding characteristic against the lens holder 4 having carbon fibers. Since the base material is formed by stainless steel, no rust is formed on the base material even though water is penetrated through the pin holes made on the plated layer. |
