| 摘要 |
PURPOSE: A lens barrel is provided to help a user to recognize the direction of the lens barrel by installing a certain mark in the top and bottom of the lens barrel respectively. CONSTITUTION: A lens barrel is comprised of a cylindrical barrel(100) and a retainer(120), having a groove for coupling a plurality of node, on the top of the barrel. One mark(130) is formed at a specific region of the retainer and other mark is formed on the outer circumference. The mark on the top of the barrel helps a user to recognize which is the top and bottom thereof while the mark on the bottom helps the user to recognize the direction thereof in assembly.
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