Put down and drag first rotation joint locking structure and flat dragging

The utility model relates to the technical field of everyday objects, a put down and drag first rotation joint locking structure and flat dragging is disclosed. This tie drags first rotation joint locking structure to include the sliding pin, spring coupling mop pole is passed through to sliding pin one end, and the other end is used for joint rotation joint, the sliding pin is used for opening with the one end of rotation joint joint has the gyro wheel groove, the gyro wheel groove is fixed with a gyro wheel through the pivot, rotation joint surface open have with gyro wheel assorted recess. When the crowded water of needs, the mop pole rotates to one end around rotation joint for the mop pole is parallel with mop head subassembly, and at this moment, the gyro wheel rolls along rotation joint surface in the roll -in recess, realizes joint limiting displacement, and the rotation of restriction mop head subassembly can be slided and smoothed out with the fingers the water subassembly and crowd water to mop hea