| 摘要 |
PROBLEM TO BE SOLVED: To make a bellows-like light shielding and dustproofing rubber arranged in order to prevent a light beam and a foreign matter such as, sand and dust from entering the inside of a lens barrel hardly have sand, dust and the like stuck and properly elongated and contracted. SOLUTION: A photographing lens unit 10 consists of a lens holding frame 12 which moves forward and backward in an optical axis direction and holds a photographing lens 11. A lens barrel frame 28 is constituted so that the unit 10 is supported and the frame 12 is covered by the lens 11 and provided with an aperture part 28b for the lens 11. Then, the bellows-like light shielding and dustproofing rubber 30 is elongated and contracted by following up the forward and backward movement of the frame 12 so as to surround an interval between the frames 12 and 28. Besides, the back end of the rubber 30 is held at the flange part 12d of the frame 12 and the front end thereof is held at the flange part 28a of the frame 28 by a pressing plate 31 by piercing through the aperture part 28b of the frame 28. Then, Teflon(R) based coating processing is executed at the surface of the rubber 30 in order to prevent rubber from being stuck to it.
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