| 摘要 |
PURPOSE:To execute an exact focus adjustment, and to obtain a high quality image by supporting both side parts of a lens body by a supporting member consisting of a u-shape, and moving linearly the lens body by following a rotating motion of this supporting member. CONSTITUTION:When a prescribed switch is turned on, a motor 42 rotates in a prescribed direction, and a driving shaft 44 also rotates through gears 45, 46. When the driving shaft 44 rotates, a nut 47 and a driving arm 51 to which it is fixed approach a bearing 43. A connecting part 25b of a lever 25 connected to the driving arm 51 with a screw 54 also tries to move in the direction approaching the bearing 43, but the lever 25 is installed to a side face chassis 34 with a screw 36, and the lever 25 rotates clockwise centering around the screw 36. The tip part of an opposed part 25a of the lever 25 also rotates so as to go away from a cylinder 41, and a cylinder 3 and a lens 2 connected to this tip part move forward, being guided by the cylinder 41. In this way, the exact focus adjustment is executed and the image of a high quality is obtained. |
