| 摘要 |
PURPOSE: To provide a structure of lens moving mechanism preventing the backlash of a lens frame by providing a frame pressing part pressing the lens frame to a guide bar in a moving piece. CONSTITUTION: The moving piece 26 is constituted of a screw receiving part 26a and a supporting part 26c, and the screw receiving part 26a is screwed in the turning shaft 24a of a stepping motor 24. The supporting part 26c is provided with an nipping part 26e and the frame pressing part 26f. The lens frame 28 adjacent to the moving piece 26 is constituted of a sliding part 28a and a lens mount part 28b, and the sliding part 28a is attached to freely slide on the guide bar 34 parallel with an optical axis S, then a focusing lens 20 is held in the lens mount part 28b. An engaging part 28d is protrusively formed on the external part of the sliding part 28a, and held by the nipping part 26e. The frame pressing part 26f presses the outside wall of the sliding part 28a to the guide bar 34. Therefore, the backlash of the lens frame 28 on an optical axis S is not caused irrespective of the sliding of the lens frame 28, and image blurring caused by the backlash of the focusing lens 20 is prevented. |
