| 摘要 |
<p>A technique which, in normal use of a camera, reliably prevents loosening of the screw thread engagement between a body and a lens barrel and which, in lens interchanging operation, enables the lens barrel to be removed from the body without causing damage to the camera. A lens loosening prevention member is provided with: a tube body section (41) which covers both an engaging groove (23) and a catch claw (33) with a body-side cylindrical section (21) and a barrel-side cylindrical section (31) engaged with each other through screw threads; an engaging plate (42) which has a shape complementary to the engaging groove (23) and is provided to the tube body section (41) so as to be fitted to the engaging groove (23) from the optical axis direction; and an engaging claw (43) which is provided to the tube body section (41) so as to be engaged with the catch claw (33) and which, in a state in which the engaging plate (42) is engaged with the engaging groove (23), restricts the rotation of the catch claw (33) only in the direction in which the screw thread engagement is released.</p> |
