LENS BARREL

PROBLEM TO BE SOLVED: To provide a lens barrel that is excellent in assembly work efficiency.SOLUTION: A lens barrel 1 according to the present invention comprises: a plurality of electric components 11, 20, 25, 30, 35 and 60; a plurality of first electric connection lines a1, b1, c1, d1, e1 and f1 that have one-side ends and are connected to the electric components 11, 20, 25, 30, 35 and 60, respectively at the one-side ends; a relay substrate 40 to which respective other ends of the first electric connection lines a1, b1, c1, d1, e1 and f1 are connected; one or more second electric connection lines a2, b2, cd2 and ef2 whose one-side ends are connected to the relay substrate 40 to be thereby electrically connected to the first electric connection lines a1, b1, c1, d1, e1 and f1, respectively; and a main substrate 70 to which the other ends of the second electric connection lines a2, b2, cd2 and ef2 are connected. A plurality of lines c1, d1, e1 and f1 of the first electric connection lines a1, b1, c1, d1, e1 and f1 is collectively connected to one line of the second electric connection lines cd2 and ef2 corresponding to a function. 【課題】組立作業効率の良いレンズ鏡筒を提供する。【解決手段】本発明のレンズ鏡筒１は、複数の電気部品１１，２０，２５，３０，３５，６０と、電気部品１１，２０，２５，３０，３５，６０のそれぞれに一端が接続された複数の第１の電気接続線ａ１，ｂ１，ｃ１，ｄ１，ｅ１，ｆ１と、第１の電気接続線ａ１，ｂ１，ｃ１，ｄ１，ｅ１，ｆ１のそれぞれの他端が接続された中継基板４０と、中継基板４０に一端が接続されることで第１の電気接続線ａ１，ｂ１，ｃ１，ｄ１，ｅ１，ｆ１のそれぞれと電気的に接続される１以上の第２の電気接続線ａ２，ｂ２，ｃｄ２，ｅｆ２と、第２の電気接続線ａ２，ｂ２，ｃｄ２，ｅｆ２の他端が接続されるメイン基板７０と、を備え、第１の電気接続線ａ１，ｂ１，ｃ１，ｄ１，ｅ１，ｆ１のうちの複数本ｃ１，ｄ１，ｅ１，ｆ１は、第２の電気接続線の１本ｃｄ２，ｅｆ２に機能に応じてまとめて接続されていること、を特徴とする。【選択図】図５