| 摘要 |
PURPOSE:To make the size thin axially and to attain small sized system with incorporated camera, by providing a roller bearing between an opposing plane of a fixed drum and a rotating member and a driving means of optical system at the center from the bearing. CONSTITUTION:A drum 23 is turned with a torque of a magnet 40 with a bearing 35 supported. A tape of the outer surface of the drums 23 and 24 is scanned with a head 43. A light is converted at a photoelectric conversion element 61, an automatic focus circuit discriminates out of focus, an optical system is driven with an exciting current and stopped at focusing. The input light to a solid- state image pickup element 58 is converted and recorded at a magnetic head 43. Since the roller bearing 35 has a large diameter, the effect of shift in relative position is less. Thus, the distance between the bearings can be decreased for thin size. Since an rotational shaft is provided, the automatic focus mechanism can be located at the space and a small sized device incorporated with an automatic focus camera can be obtained. |
