Abstract: A method of producing workpiece having irregular cross section by stamping thin plate into thick plate is provided. In the method, a thin plate having a uniform thickness corresponding to that of a thinner area to be formed on the workpiece is used. Multiple stamping heads having different and gradually increased bevel angles are used one by one to stamp one or two sides of the thin plate at a predetermined scrap area, so that a part of the scrap area is gradually compressed and pushed toward a specific area that is to have larger thickness on said workpiece. When the specific area bumps to a predetermined height, a stamping mold is used to downward stamp the bumped area into a predetermined shape. Thereafter, the remained scrap area on the thin plate is removed to obtain the desired workpiece. The method enables largely reduced scrap and manufacturing time and cost in forming a workpiece having irregular cross section.

Abstract: A connector socket includes a main body having a card slot and a guide hole communicable with the card slot, a metal cover having a guide channel at one side opposite to the guide hole and a downward extended stopper opposite to the card slot, a control bar movably received in the guide channel, and a metal lever located between the metal cover and the main body and held to the metal cover with a hooking plate upwardly projecting from a hole in the metal cover. The metal lever has a first downwardly bent end engaged with an inner end of the control bar to move along with the latter, and a second downwardly bent end engaged with the guide hole on the main body. A rear edge of the metal lever has at least one supporting point in contact with the stopper of the metal cover.