| 摘要 |
A focus adjustment mechanism for a camera, includes a housing defining an interior cavity in which is positioned a helical track. A lens support is provided which supports a lens. The lens support is engaged with the helical track. Rotation of the lens support in a first rotational direction moves the lens support in a first axial direction along the helical track and rotation of the lens support in a second rotational direction moves the lens support in the second axial direction along the helical track. At least one magnet is fixed to the lens support. This construction permits an external magnetic force to be used to selectively cause rotation of the lens support to focus the lens.
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