| 摘要 |
PROBLEM TO BE SOLVED: To provide a shielding member between two relatively moving frame members of excellent sliding ability without generating fracture or lenticulation by forming a diamond-like carbon(DLC) film on the surface at least slidably contacting a second frame member. SOLUTION: A zoom lens barrel frame is constituted of a main frame 21 made of resin and as a first frame member internally providing a photographing optical system, a sub-mirror frame 22 as a second frame member fittedly mounted on the main mirror frame 21 to hold the photographing optical system, movable in the optical axis direction of this optical system, and made of resin, and a shielding member 1A slidably contacting the outer circumferential face 22a of the sub-mirror frame 22 fixedly fitted to the main mirror frame 21. This shielding member 1A is constituted of a holding part 2A and a slidable contact piece 3A. On the slidable contact face of the piece 3A, a DLC film 4A made of amorphous carbon is formed in thickness of 0.5 μm by a plasma chemical gaseous phase vapor deposition method. The holding part 2A is fixedly fitted to a groove 21a formed on the inner circumference of the extreme end part of the main mirror frame 21 with adhesive. Hereby, the base material of the shielding member does not generate change such as expansion or contraction. |
