| 摘要 |
PURPOSE:To eliminate oscillation, mechanical sounds, and image skip for lens movement and to miniaturize a device by providing a lens barrel and an enclosure with an engaging part and an engaging groove which are brought into contact with each other to freely slidably support the barrel. CONSTITUTION:Projection parts 13 on the outside peripheral surface of a lens barrel 11 in which a lens 10 is built are engaged with engaging grooves 14 on the inside surface of an enclosure 12, and the barrel 11 is slidable in the direction of the optical axis. A screw 19 is elastically engaged with a tooth part 17 of the barrel 11 by an elastic holder. When a pulse motor 31 is rotated in this constitution, the barrel 11 is slided in the direction of the optical axis without being rotated. Since contacting among gears is eliminated, the occurrence of oscillation, mechanical sounds, and image skip is prevented. The barrel 11 is supported at three points in the enclosure 12, and a high torque is not required, and the motor 31 and the device are miniaturized. |
