Patent ID: 7520756

Claim:
A middle electrical connector for connecting a mating connector, comprising: a housing made of an electrical insulation material; a terminal arrangement plate disposed in the housing, said terminal arrangement plate including a guide groove extending linearly in a first direction, said terminal arrangement plate further including a protrusion portion extending linearly in a second direction perpendicular to the first direction and crossing over the guide groove, said protrusion portion having a first retaining groove and a second retaining groove each situated over the guide groove, said first retaining groove having at least one of a shape and a size different from that of the second retaining groove; and a terminal arranged on the terminal arrangement plate and retained in the guide groove, said terminal including a first retained portion and a second retained portion, said first retained portion being tightly fitted in the first retaining groove, said second retained portion being tightly fitted in the second retaining groove.