| 摘要 |
PURPOSE:To make a lens barrel light in weight and to reduce the cost thereof by disusing a dedicated guide pole. CONSTITUTION:A screw pole 3 which is rotatably supported in the lens barrel 5 in parallel with an optical axis, a potentiometer 1 which is disposed on the opposite side to the pole 3 in the lens barrel 5 by interposing the optical axis so as to make the moving direction of a slide part 1a in parallel with the optical axis, a moving ring 2 which holds a variable power lens L and which is obtained by screwing a screw hole 2a provided on one side to the pole 3 and engaging an engagement part 2b provided on the other side with the slide part 1a, and a driving source 4 which gives rotational force to the pole 3 are provided. |
