FPC board guiding device of the zoom lens barrel

摘要

PROBLEM TO BE SOLVED: To prevent the looseness of a flexible printed circuit board by providing the specified flexible printed circuit board for connecting a shutter mounted on an advance and retreat barrel and a control part, and equally setting the relative advance and retreat amount and speed of the advance and retreat barrel at the time of zooming. ;SOLUTION: The flexible prited circuit board 6 passes the inner surface of a moving lens barrel 19 from an AF/AE shutter unit 21, is turned back at the trailing end of the lens barrel 19, and further turned back along the outer surface 17h of a straight advance guiding barrel 17 from the leading end of the FPC board introducing groove 17g of the barrel 17, and passes through a through-hole 17i so as to be connected to the control part 75 through another flexible printed circuit board at a fixed end 6h. The relative advance and retreat amount and speed in an optical axis direction of a 1st moving lens barrel 20 to a 2nd moving lens barrel 19 and those of the 2nd moving lens barrel 19 to a 3rd moving lens barrel 16 at the time of zooming are nearly equally set. Thus, the looseness of the flexible printed circuit board is prevented without providing a receiving part receiving the looseness of the flexible printed circuit board.;COPYRIGHT: (C)1997,JPO