US Patent 7144277 Electrical connector with guidance face

An electrical connector (1) for mating with a mating connector includes an insulating housing (10), a number of electrical contacts (20) received in the housing (10). The housing (10) has a mating face (11), a mounting face (12), two opposite side walls (13) for connecting the mating face and the mounting face, a receiving space (15) depressed in the mating face is formed between the side walls. A guidance face (17) is formed on the inner face (131) of the sidewalls extending from the mating face to the deep-lever of the receiving space, which includes an arc face (171) and a slant face (172) tangent to the arc face. Each contact has a contact face (221) exposed to the receiving space.