Electrical connector with different pitch terminals

A contact assembly for an electrical connector comprising a frame, the contact assembly comprising:

• a plurality of first contacts being arrayed on the frame in rows parallel to each other, each of the first contacts comprising a retention portion vertically secured in the frame, an upper resilient arm slantwise and upwardly extending from one end of the retention portion and formed with a substantially horizontal contact portion at a distal end thereof, a lower arm extending downwardly from an opposite end of the retention portion and formed with a connecting portion at a distal end thereof;
• and
• a plurality of second contacts mounted on the frame, each of the second contacts comprising a securing portion mounted in the frame, a mating portion extending upwardly from one end of the securing portion and adapted to mechanically and electrically engage a corresponding connecting portion, and a mounting portion downwardly from an opposite end of the securing portion;
• wherein the mating portions and the mounting portions of the second contacts are arrayed in rows parallel to each other, respectively, one row of mating portions comprising the second contacts whose mounting portions are divided into at least two rows, the mating portions corresponding to the mounting portions in one of said at least two rows are staggerly arrayed with the mating portions corresponding to the mounting portions in the remaining rows, respectively, so that the mounting portions of two adjacent second contacts form a pitch therebetween larger than that defined between the mating portions of said two adjacent second contacts.

An electrical connector assembly for electrically interconnecting an electrical device with an electrical substrate comprising:

• a dielectric base;
• a lid movably mounted on the base;
• a module mounted on the base and comprising a housing immovably secured on the base and a plurality of terminals secured on the housing in rows parallel to each other, each of the terminals comprising a middle part, upper and lower engaging portions extending from opposite ends of the middle part;
• a cover movably mounted on the housing for supporting the electrical device;
• positioning means pivotally mounted on the base and attached to the lid for securing the electrical device on the cover;
• and
• a contact module mounted on the base and comprising a dielectric mounting plate and a plurality of contacts secured on the mounting plate, each of the contacts comprising a retention portion secured on the mounting plate, an upper mating portion extending from one end of the retention portion, and a lower mating portion extending from an opposite end of the retention portion and adapted to electrically attach to the electrical substrate;
• wherein the upper mating portions and the lower mating portions of the contacts are respectively arrayed in rows and the contacts corresponding to at least one row of the lower mating portions each define an offset portion to make the pitch between any two adjacent lower mating portion larger than that between any two adjacent upper mating portions.

An electrical connector assembly comprising:

• an printed circuit board;
• a dielectric base located above said printed circuit board;
• a lid moveable mounted to the base;
• a first terminal module positioned in the base with a plurality of first terminals thereof;
• an electronic device located above the terminal module and under the lid, and defining a plurality of first conductors in electrical engagement with the first terminals;
• a biasing device forcing the lid away from the base while pressing the electronic device against the first terminals;
• and
• a second terminal module sandwiched between the printed circuit board and the base and including a plurality of second terminals, upper sections of the second terminals compliantly engaged lower sections of the corresponding first terminals, respectively, lower sections of the second terminals mechanically and electrically connected to second conductors of the printed circuit board;
• wherein
• a pitch of said first conductors is smaller than that of the second conductors, and said first terminals and said second terminals perform a transition function for pitch alternation between the first conductors and the second conductors.