Patent ID: 7896654

Claim:
An electric connection structure comprising a metal element with an axle socket and a metal element with an axle head, one side of the metal element with an axle socket being the axle socket structure and its cross section edge being a concave asymptotic spiral line; one side of the metal element with an axle head being the axle head structure and its cross section edge being a convex asymptotic spiral line that corresponds to the axle socket to form a structure so that said axle head can be easily inserted at a certain angle into said axle socket along the axial center of the spiral line to form a hinge shape and leave a certain clearance; when the metal element with an axle head rotates along the asymptotic direction of the spiral line, the clearance between the axle head and the axle socket will be gradually reduced until it disappears; if the rotation continues, a compressive force will be generated between the axle head and the axle socket so that they are tightly combined to form a plane-to-plane, tight, unfailing contact face with a large contact area.