Patent ID: 7249475

Claim:
A padlock comprising: a shackle having a first end and a second end; and an arm, the arm being extendable along an axis of the arm, the arm comprising; a locking mechanism comprising an axle pivotally connected to the second end, and a plurality of tumblers passed through by the axle, the axle defining an inner channel; and a movable connection component having a head and a shaft connected to the head, the shaft passing through the tumblers; wherein the head and the shaft are coaxially movable relative to the first end and the second end, and the first end is aligned to the head and the shaft, and when the locking mechanism is in a locked position, the head is attached to the first end and when the locking mechanism is in an unlocked position, only the movable connection component is movable along the axis of the arm toward the locking mechanism and the head is retracted to detach from the first end.