Electrical connector with improved actuator

An electrical connector comprising:

• an insulative housing having a top wall, a bottom wall and two side walls and defining a chamber between the top wall, the bottom wall and the side walls, the bottom wall defining a plurality of cavities communicating the chamber, each side wall defining a U-shaped guiding slot at a front end thereof, the guiding slot including an upper segment and a lower segment;
• a plurality of contacts each including an engaging portion and a tail portion, each engaging portion being fixedly received in a corresponding cavity and having a ridge extending into the chamber of the housing, each tail portion rearwardly extending beyond a rear face of the housing;
• and
• an actuator having an elongated bar, two engaging arms rearwardly extending from opposite ends of the elongated bar and a tongue portion rearwardly extending from the elongated bar and being located between the two engaging arms, each engaging arm having a pivot confronting the tongue portion, the pivot being slidably received in the guiding slot of the housing to be located either in the upper segment of the guiding slot in which the tongue portion is spaced a first distance from the ridges of the contacts as measured along a direction perpendicular to the bottom wall of the housing or in the lower segment of the guiding slot in which the tongue portion is spaced a second distance from the ridges of the contacts in the same direction which is smaller than the first distance.