| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw fixing mechanism capable of preventing a viewfinder from dropping off due to a loosen screw.SOLUTION: A viewfinder fixing unit 101 includes: a holder 6; a ring 4; a washer 5; dowel 5c; and plural inner peripheral recesses and protrusions 4c. The holder 6 has a male screw 6a. The ring 4 has a female screw 4d which is screwed by the male screw 6. The washer 5 is provided between the holder 6 and the ring 4. The dowel 5c is provided to the washer 5. The plural inner peripheral recesses and protrusions 4c are formed on the ring 4 along a peripheral direction thereof. When the ring 4 is rotated, the holder 6 and the ring 4 get closer to each other by the male screw 6a and the female screw 4d. When the washer 5 and the ring 4 get closer up to a predetermined distance, the washer 5 and the ring 4 come into contact with the dowel 5c. |
