| 摘要 |
A lens holder includes an inner barrel for holding at least one lens, an outer barrel that is positioned outside the inner barrel and supports the inner barrel so that the inner barrel linearly slides along a central axis thereof across an inner surface of the outer barrel, and a cam barrel that rotates in a state where the cam barrel is coaxially disposed between the inner barrel and the outer barrel. The cam barrel includes at least two subunits of the same shape produced by dividing the cam barrel on a plane that includes the central axis, an operating part that passes through an operating slit provided on the outer barrel and moves at least one of the subunits to rotate the cam barrel, a helical cam mechanism that slides, via a driven part provided on the inner barrel, the inner barrel forward and backward along the central axis when the cam barrel rotates, and a locking mechanism for pulling at least one of the subunits onto the outer barrel to stop rotation of the cam barrel.
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