An electrical connector comprises a cover, terminal block, and pair of latch mechanisms. The cover comprises a top plate and two side edges connected to the top plate. The terminal block and the cover together define a slot. The terminal block comprises two opposite side edges. The pair of latch mechanisms is respectively provided between the two side edges of the cover and the two side edges of the terminal block. Each latch mechanism can include a first latch portion and a second latch portion. The first latch portion and the second latch portion are latched to each other and in a clearance fit, so as to allow the terminal block to rotate and move relative to the cover at the latch mechanism.