Switch type plug

The utility model discloses a switch type plug, which comprises a shell, a shell cap clamped with the shell, end caps clamped with two sides in an insertion end of the shell, square blocks fixedly connected with two sides in the insertion end of the shell in a threaded manner, a rotating sleeve movably sleeved with the square blocks, and meshing teeth integrally formed and connected with the side, close to the center of the shell, of the rotating sleeve. Insertion pieces are fixedly inserted into the rotating sleeves, a T-shaped push lock rod is movably arranged between the two rotating sleeves, and when the T-shaped push lock rod is pushed, the T-shaped push lock rod makes contact with the rotating sleeves and fixes the positions of the rotating sleeves. The power plug is simple in structure, and solves the problem that the power plug cannot be switched back to two poles after being switched from two poles to three poles in life. 本实用新型公开了一种开关式插头，包括：外壳，所述外壳卡接壳帽，所述外壳的插入端内两侧卡接端盖帽，所述外壳的插入端内两侧螺纹固定连接方形块，所述方形块活动套设旋