| 摘要 |
PURPOSE:To fit a lens easily and speedily by sealing the lens by introducing its peripheral edge part into the large-diameter part of a cylindrical holder which is compressed to deform along the step of a lens fitting hole. CONSTITUTION:The cylindrical holder 15 is pressed in the lens fitting hole 12 of a lens holder 11 together with the lens 17. The large-diameter part 16 of the holder 15 is compressed inward to deform along the inner peripheral surface from the opening part 13 of the fitting hole 12 to the step 14 while pressed in, and the lens 16 is held by intruding the peripheral edge part of the lens 17 into the large-diameter part 16. The tip peripheral edge part 16a of the large-diameter part 16 is set larger than the thickness of the base peripheral edge part 16b of the large-diameter part 16 and the front peripheral edge part 17a of the lens 17 is tapered. Consequently, the peripheral edge part of the lens 17 intrudes into the large-diameter part 16 greatly by the compressive deformation of the large-diameter part 16, thereby sealing the lens 17 securely. |
