Overhead shower head that can be assembled or disassembled without a wrench

An overhead shower head, comprising:

• a shower head main body;
• and
• a universal ball disposed in a ball fixing seat at a rear side of the shower head main body, the universal ball including a passage extending through the universal ball and being in communication with an opening of the shower head main body,
• wherein an abutting fitting portion is disposed between the universal ball and the ball fixing seat, the abutting fitting portion configured such that when the ball fixing seat rotates, in a rotation direction, through a first rotation angle, the abutting fitting portion allows the ball fixing seat to rotate relative to the universal ball through a second rotation angle less than the first rotation angle, and, when the ball fixing seat has rotated through the second rotation angle, the abutting fitting portion engages the universal ball with the ball fixing seat in the rotating direction, so that the universal ball and the ball fixing seat rotate together through a third rotation angle corresponding to a difference between the first rotation angle and the second rotation angle,
• wherein the abutting fitting portion comprises a stop block disposed at a side surface of the universal ball and a limit slot disposed in the ball fixing seat,
• wherein the stop block and the limit slot are configured such that when the ball fixing seat and the universal ball rotate relative to each other, the stop block rotates in the limit slot, and when the stop block moves to an end of the limit slot and abuts against the end of the limit slot, the ball fixing seat and the universal ball rotate together,
• wherein the limit slot is disposed in an internal periphery surface of a ratchet wheel,
• an external periphery of the ratchet wheel and an internal periphery of the ball fixing seat are disposed with interlocking ratchets, and
• wherein the ratchets of the ball fixing seat and the external periphery of the ratchet wheel are configured such that rotating the universal ball relative to the ball fixing seat at a predetermined angle, after engaging the ratchets of the ball fixing seat and the external periphery of the ratchet wheel, causes the ratchets of the ball fixing seat and the external periphery of the ratchet wheel to squeeze, so that the ratchets of the external periphery of the ratchet wheel deform inwardly and separate from the ratchets of an external periphery of the ball fixing seat.