| 摘要 |
PURPOSE:To increase the mechanical strength in a mounting part by prohibiting the sticking of a skin material to the inside wall part of the mounting part and packing only the core material into the inside wall part in the stage of providing a projection part in addition to the accessory mounting part to the outside periphery of the helicoid barrel part for holding lens to constitute an optical machine and packing a skin material into the barrel part. CONSTITUTION:A wall part 22d is raised to the end of a lens holding frame part 22c provided with lens holding frame parts 22c1, 22c2, etc., on the inside and the helicoid barrel part 22a parallel with the lens holding frame part 22c is formed thereon. The accessory mounting part 22f is provided to the surface at one end of the barrel part 22a and the helicoid part 22b is provided to the surface in the central part. The projecting part 22e which projects horizontally to the lens holding frame part 22c is bulged from the wall part 22d and is provided thereto in addition to said parts. Then, the skin material S does not reach the inside wall part of the mounting part 22f in the stage of packing said material to the surface of the barrel part 22a by using a metallic mold. Only the core material C is thus packed therein. |
