US Patent 10490940 Electrical connector having protruding portions on metal shell

An electrical connector includes an insulating body having a base and a tongue extending forward from the base, multiple terminals fixed in the base and extending to the tongue, and a metal shell. An insertion space is formed between the metal shell and the tongue. The metal shell has first protruding portions protruding toward the insertion space. Each first protruding portion has a first height along the vertical direction. The first height is greater than or equal to 0.02 mm and less than or equal to 0.08 mm. Thus, the corresponding fit clearance in the vertical direction between the electrical connector and a mating connector can be controlled within a range from 0.059 mm to 0.001 mm.