Patent ID: 7133216

Claim:
An image pickup device comprising: a lens barrel unit including a first barrel having a cam groove formed in an inner peripheral surface thereof, and a second barrel, said first and second barrels being shifted relative to each other from a collapsed position in a direction along an optical axis and into a range from a wide-angle position to a telephoto position in which a picture can be taken; said second barrel being engaged with said first barrel and being movable toward an object with respect to said first barrel; said second barrel having a first projection formed thereon and engaged with said cam groove; said second barrel having a second projection formed thereon at a position different from a position in which said first projection is formed; and said first barrel having a third projection formed thereon, for engagement with said second projection, said third projection extending in the range from the wide-angle position to the telephoto position, wherein: said second projection is positioned on a side toward the object with respect to said third projection when said lens barrel unit is in the range from the wide-angle position to the telephoto position; and said second projection abuts on said third projection when an external force acts on said second barrel from the side toward the object.