| 摘要 |
PURPOSE: To increase blanking ratio so as to save waste of a material in use, by forming a wasted part mainly in an area part formed between a pair of the first spring parts, when formed molding from a metal plate material. CONSTITUTION: Unfolding shape of a punched plate 12 comprises a squared base plate part 13, ring/left side wall parts 14 and the first spring parts 15 respectively extension formed in a belt shape in a parallel direction from one side edge 31 orthogonal to the first fold line (a) of the side wall part 14. Further, in an opposed side edge of the first fold line (a) of the one side wall part 14, an upper wall part 16 protruded sideward with the second fold line (b), provided in parallel to this opposed side edge, serving as the boundary and the second spring part 17 orthogonal to the second fold line (b) to be extension formed in a belt shape in the parallel direction to the second fold line (b) from a side edge on the side of approaching the first spring 15 are formed. A notched hole 29 for cut-raising a lock pawl 18 for performing locking to a housing is formed on both the first fold lines (a). |
