HAND-WOUND TIMEPIECE RETURN SPRING STRUCTURE, AND HAND-WOUND MECHANISM AND HAND-WOUND TIMEPIECE HAVING THE SAME

摘要

A return spring structure of a hand-wound timepiece has a plate-like placement portion that is placed on a surface of a support member. A forced insertion hooking spring portion is forcibly inserted into an opening of a locking plate-like portion of the support member, and has a forced insertion hooking end portion locked in a back surface of a wall defining the opening and a hooking spring arm portion extending from one edge portion of the plate-like placement portion. A return spring portion extends from the other edge portion of the plate-like placement portion. The return spring structure also has a positioning spring portion that includes a positioning spring arm portion extending parallel to the hooking spring arm portion from the one edge portion of the plate-like placement portion and a forced insertion engagement end portion engaged with the opening of the support member at the forward end portion.