an insulation base, comprising an accommodation space, an insertion port and a side opening communicating with the accommodation space, and a limit column and a pivot part disposed in the accommodation space of the insulation base;

a conductive terminal, comprising a conductive body and a plurality of lead pins, and the conductive body positioned in the accommodation space, and the lead pins passing out from the insulation base;

an elastic plate, comprising an abutting arm, a bend section extended from the abutting arm, and a fixed section coupled to the bend section, and the abutting arm comprising a curved surface, and the abutting arm suspended on a side of the insertion port, wherein the limit column is located within the bend section, and the pivot part is located out of the bend section; and

a handle structure, comprising a handle, a pressing cam and a pivot, and the pivot being combined with the pivot part to make the handle protrude from the insulation base, and the pressing cam abutting against a curved surface of the abutting arm;

wherein the handle structure comprises a pressing block disposed thereon, and the pressing cam and the pivot are disposed on a bottom edge of the pressing block, and the pivot is located below the insertion port and adjacent to the curved surface of the abutting arm, and the pivot is located between an outer side of the elastic plate and the insertion port.