The utility model discloses a large-current low-
insertion-and-extraction-force reliable type bur structure which comprises a female needle and a male needle. A female pin comprises a female pin body and an elastic piece, the female pin body is made of pure
copper materials, the elastic piece is arranged in an annular positioning groove and matched with the annular positioning groove, a convex
hull of the elastic piece penetrates through a through groove and then extends into an inserting cavity, the elastic piece is made of
beryllium copper materials, and a male pin inserting connector is detachably arranged in the inserting cavity. According to the bur structure, the
insertion and extraction force between the male needle and the female needle can be effectively reduced, the connection stability between the male needle and the female needle is ensured, and convenience is brought to use of a user; during plug-in, the outer wall of the male pin connecting plug is in contact conduction with the female pin convex
hull to form first contact, the outer wall of the male pin connecting plug is in contact conduction with the inner wall of the female pin
insertion cavity to form second contact, transmission of larger current can be achieved through the two contacts, product quality and connection stability are improved, and circuit connection is more reliable.