| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lens barrel capable of being made compact.SOLUTION: A lens barrel 20 includes a second rotary frame 220 and a third rectilinear frame 130. The second rotary frame 220 has first and second bayonet grooves e31, e32 and a cam groove b4 intersecting with the first and second bayonet grooves e31, e32. The third rectilinear frame 130 has first and second bayonet protrusions E31, E32 engaged with the first and second bayonet grooves e31, e32. When the first bayonet protrusion E31 is located near the com groove b4, the second bayonet protrusion E32 is engaged with the second bayonet groove e32. When the second bayonet protrusion E32 is located near the cam groove b4, the first bayonet groove E31 is engaged with the first bayonet groove e31.</p> |
