Patent ID: 7221402

Claim:
A monitoring camera comprising: a body ( 10 ) having a front end; a side face; a recess ( 11 ) defined in the front end; and a lens mount ( 14 ) inside the recess ( 11 ) and having an inner threaded surface ( 141 ); a focus ring ( 20 ) being a disk, mounted rotatably inside the recess ( 11 ) and having an outer edge; a central hole; an inner face; an inner flange ( 22 ) formed on and protruding from the inner face around the central hole and having an inner threaded surface ( 24 ) and an outer threaded surface ( 23 ) to screw into the inner threaded surface ( 141 ) of the lens mount ( 14 ); and an outer flange ( 26 ) formed on and protruding from the inner face around the outer edge; and a lens ( 30 ) mounted in the focus ring ( 20 ) and having a threaded proximal end ( 32 ) screwed into the inner threaded surface ( 24 ) of the focus ring ( 20 ).