Electrical connector for exerting multiple elastic forces

Claim 1

An electrical connector comprises: a connector base generally formed as an elongate shape, a plurality of slots juxtapositionally laterally formed in the base for embedding a plurality of contact elements in said slots, and a pair of latches respectively formed on two opposite end portions of the connector base for locking a daughter printed circuit board clamped by the contact elements for electrically connecting the daughter board to a mother printed circuit board positioned under said electrical connector; each said contact element made of electrically conductive material including: a base member embedded in a bottom portion of the slot formed in the connector base, a leg member protruding downwardly from the base member to be fixed into a leg hole formed in the mother board, two side engaging members respectively formed on two opposite end portions of the base member respectively embedded with two side walls of the slot in the connector base, a first spring arm member protruding inwardly from a pivot portion secured to a first side engaging member, a first contacting protrusion formed as a convex portion adjacent to he first spring arm member, a concave linking member concave downwardly from the first contacting protrusion, a second contacting protrusion connected with the concave linking member and formed as another convex portion for facing the first contacting protrusion and defining an aperture between the two protrusions, the improvement which comprises: said first spring arm member forming a bow portion between the first spring arm member and the first side engaging member for exerting a strong elastic force from said bow portion; and said second contacting protrusion connected with a second spring arm member secured to said base member of said contact element.