Receptacle electrical connector assembly

Claim 1

A receptacle electrical connector assembly comprising: a main frame having three receiving cavities; an upper, a lower, and a middle electrical connectors securely received in corresponding receiving cavities of the main frame, each electrical connector having a housing and a plurality of contacts received in the housing, each housing comprising a pair of side projection portions, a front projection, and an insert hole defined through the front projection, each plurality of contacts comprising a first contact, a second contact, a grounding contact, and a pair of switch contacts, each contact defining a base portion, a pair of sidebars extending from the base portion, and a contacting portion extending from one of the two sidebars, the contacting portions of the grounding contacts of the three electrical connectors projecting from the same side portion of the housings, the contacting portions of the contacts of the middle electrical connector projecting from the other side portion of the associated housing; a first side cover and a second side cover for assembling on both sides of the main frame; a first group of terminals, a second group of terminals, and a grounding terminal mounted on the first side cover and a third group of terminals mounted on the second side cover, each terminal engaging with the contacting portion of a corresponding contact; and a metal shield covering a front of the receptacle electrical connector assembly; wherein: each housing defines two pairs of first grooves, a pair of second grooves, a pair of third grooves, and a pair of grounding grooves for receiving the first contact, the second contact, one of the switch contacts, the other of the switch contacts and the grounding contact, respectively; each of the first and second contacts has a mating arm extending into the insert hole of the housing; wherein an engaging patch is positioned on an end of the sidebar of each contact, a mating arm and a contact bar inclinedly depend from the base portion of the first contact, and a contact bar depends from the mating arm of the second contact; wherein each terminal comprises a contact section engaging with the contacting portion of the contact and a soldering section, and two adjacent soldering sections of each group of terminals are offset from each other; wherein the main frame has three pairs of opposing locking arms, and each housing has a top and a bottom fastening portion to engage with corresponding locking arms; wherein the first side cover and the second side cover each comprise a main body, a plurality of latches extending from the main body, a plurality of notches defined on edges of the main body, a plurality of positioning blocks formed from an inner wall of the main body, and a plurality of spacing slots formed in a bottom edge of the main body.