| 摘要 |
PURPOSE:To reduce the generation of noises by providing guide holes and a guide groove on a lens holding frame, arranging a 1st guiding pole which engages the guiding hole and a 2nd guiding pole which engages the guiding groove, and applying a lubricant which has higher viscosity than the 1st guiding pole to the 2nd guiding pole. CONSTITUTION:A rack member 18 is pressed against the driving shaft of a stepping motor 20 and the guiding holes 13a and 13b and guiding groove 13c are formed at mutually opposite positions of a lens holding frame 13 which is coupled and associated with the racking member 18. The 1st guiding pole 15 which is coated with a low-viscosity lubricant 38 is run through the guiding holes 13a and 13b, the 2nd guiding pole 16 which is coated with the high- viscosity lubricant 39 is run through the guiding groove 13c, and the lens holding frame 13 is arranged slidably along them. Consequently, even when a lens is moved forward/backward, the noises are reduced. |
