To provide a lens mounting position adjusting mechanism whose adjusting operation is easy and which is constituted so that the mounting position of a lens is finely adjusted in an optical axis direction without changing the optical axis position of the lens in a barrel-shaped lens frame at the time of production.
At the time of assembly, the screw part 5a of a lens barrel 5 is screwed in the screw part 4b of an adjusting member 4, and then the screw part 4a of the member 4 is screwed in the screw part 3b of the lens frame 3. In the case of finely adjusting and deciding the position of the lens mounted at a barrel part 5b, a shaft member 6 is inserted in the hole of the lens barrel 5 first, and its tip is inserted in a hole formed at the projection part 3c of the lens frame 3. Thereafter, a tool is engaged with grooves 4c and 4c and rotated so as to make the lens barrel 5 advance/retreat in the optical axis direction without rotating the lens barrel 5 in accordance with the rotating direction of the member 4. As a result, the lens mounted at the barrel part 5b is finely adjusted in the optical axis direction and positioned without changing the optical axis position.
TOMA KIYOSHI
INOUE NOBUYOSHI
