Patent ID: 7121123

Claim:
A padlock comprising: a lock body; a shackle movable relative to the lock body between a locked position and an unlocked position, the shackle having a first end movably installed within the lock body and a second end retainable within the lock body in the locked position, wherein the first end has a stop at a distal end thereof; a combination locking device installed within the lock body for controlling movements of the shackle, wherein the combination locking device comprises a frame provided for receiving the first end of the shackle and a combination unit connected to the frame, which is movable upwardly and downwardly when the combination unit is unlocked, whereby the second end of the shackle is movable to the unlocked position, wherein the frame has a slot, a first opening intercommunicated with the slot for allowing the first end of the shackle to enter therefrom, and a second opening; and a key locking device installed within the lock body for controlling movements of the shackle, wherein the key locking device comprises a block unit for blocking the first end of the shackle from moving and a key unit connected to the block unit, which is movable when the key unit is unlocked by a key, wherein the block unit has a block end against the stop of the first end through the second opening and a connecting end connected to the key unit.