Device for securing plug to socket

Claim 1

A securing device used for an adapter for tightly securing a plug to a socket comprising: a plug having a clamping element; and a socket having a fitting element corresponding to said clamping element and capable of being clamped by said clamping element for securing said plug to said socket, wherein said clamping element comprises a slab, a hook portion disposed on a first end of said slab for engaging with said fitting element of said socket, a supporting rib connected with said slab and said plug for supporting said slab, and a pressing portion disposed on a second end of said slab for allowing a user to press thereon and thereby disengaging said hook portion from said fitting element; and wherein said fitting element further includes: a first flange having a groove; a slope being in said groove, wherein said groove is in vertical alignment with an upper protrusion and a lower protrusion, wherein said protrusions extend into a cavity of said socket, and are adjacent to a terminal and substantially located in said cavity; and a second flange being rearward of said first flange and spaced a distance from said slope, wherein said first flange and second flange have an outer periphery, and wherein said second flange and said slope define a gap between said second flange and said slope, said hook portion is placed in said gap when said plug and said socket are engaged, and said first end of said slab is adjacent to said second flange when said plug and said socket are engaged.