Padlock

A padlock comprising:

• a base having an accommodation chamber and a top hole in communication with the accommodation chamber;
• a combination controlled lock unit having a shaft, which is axially moveably disposed in the accommodation chamber of the base with a top end thereof extending out of the base through the top hole of the base, a plurality of combination wheels rotatably sleeved onto the shaft and received in the accommodation chamber for controlling an axial movement of the shaft, and a plurality of retaining wheels sleeved onto the shaft and respectively engaged with the combination wheels;
• a driving member connected with the top end of the shaft of the combination controlled lock unit;
• two shackles having bottom ends thereof respectively connected with two opposite sides of the base and top ends thereof detachably engaged with each other, at least one of the shackles being pivotable relative to the base;
• and
• a latch having at least one block portion and movably mounted in the accommodation chamber of the base and connected with the shaft of the combination controlled lock unit so as to be driven by the shaft to move between a locking position where the block portion stops the pivotable shackle from movement for ensuring the engagement of the top ends of the shackles and a unlocking position where the block portion moves away from the pivotable shackle for allowing the top ends of the shackles to be disengaged from each other.