| 摘要 |
<p>PROBLEM TO BE SOLVED: To propose a power transmission device, a lens mirror cylinder and a camera capable of not remarkably reducing drive efficiency and durability even when using a belt.SOLUTION: A power transmission device 40 according to the present invention comprises: a first shaft 34 rotated by a motor 30; a first rotary member 41 which is attached to the first shaft 34 and rotates with the first shaft 34; a second rotary member 44 which is located in a radial direction of the first rotary member 41; a second shaft 42 which is attached to the second rotary member 44 in parallel with the first shaft 34 and being rotated by the rotation of the second rotary member 44; third rotary members 45 and 47 located in a radial direction of the first rotary member 41 as well as at a position opposite to that where the second rotary member 44 is located; and a drive force transmission belt 46 that is stretched to be in contact with outer peripheries of the first rotary member 41, the second rotary member 44, and the third rotary members 45 and 47 so as to transfer the rotation of the first rotary member 41 to the second rotary member.</p> |
