Electrical connector with partially overlapped and staggered contact arms

An electrical connector, comprising:

• an insulation body and a terminal group received in the insulation body, wherein the terminal group comprises upper-row terminals and lower-row terminals, a number of the upper-row terminals is equal to a number of the lower-row terminals, the upper-row terminals and the lower-row terminals are arranged in one-to-one correspondence in a vertical direction, each of the upper-row terminals is provided with an upper contacting arm extending in a horizontal direction, each of the lower-row terminals is provided with a lower contacting arm extending in the horizontal direction, wherein the upper contacting arm and the corresponding lower contacting arm partially overlap and partially stagger in the vertical direction;
• and an isolation plate between the upper-row terminals and lower-row terminals, wherein the isolation plate comprises a pair of upper grounding arms and a pair of lower grounding arms, the pair of upper grounding arms and the pair of lower grounding arms are integrally connected with the isolation plate, the pair of upper grounding arms and the upper-row terminals are arranged in a same plane, the pair of upper grounding arms is on two sides of the upper-row terminals respectively, the pair of lower grounding arms and the lower-row terminals are arranged in a same plane, and the pair of lower grounding arms is on two sides of the lower-row terminals respectively.