| 摘要 |
In a lens barrel of a fixed-focus type, a guide section of a back moving frame for holding a lens back group is disposed at the middle between two guide sections provided on a front moving frame for holding a lens front group. A guide shaft is inserted into guide holes of those guide sections. A compression spring is disposed between one of the two guide sections provided on the front moving frame and the guide section of the back moving frame. A front moving frame and a back moving frame are moved together in an optical axis. At the time of a collapse, the compression spring is further compressed.
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