Patent ID: 11866961
Assignee: ABA LOCKS INTERNATIONAL CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 1:
2. The anti-vandal padlock as claimed in claim 1, wherein the locking mechanism has
a first lock cylinder base securely mounted on the second anti-sawing sleeve and having
multiple first bolt holes;
a first shaft hole; and
a locking groove formed on an inner surface of the first shaft hole and having
a locking wall perpendicular to an axis of the first shaft hole;
an unlocking wall facing the axis of the first shaft hole, being curved, and connected to the inner surface of the first shaft hole;

a second lock cylinder base being rotatable with respect to the second anti-sawing sleeve and having

multiple second bolt holes selectively aligned to the first bolt holes;
a second shaft hole having
a limiting segment formed on an inner surface of the second shaft hole;

multiple lock bolts respectively and movably mounted in the first bolt holes and the second bolt holes; at least one of the lock bolts selectively mounted in one of the first bolt holes and one of the second bolt holes at the same time to prevent the first lock cylinder base and the second lock cylinder base form rotating with respect to each other;
multiple bolt elastic units respectively mounted in the first bolt holes and pushing the lock bolts toward the second bolt holes;
a lock shaft rotatably and axially movably mounted in the first shaft hole, and axially movably mounted in the second shaft hole; the abutting wall and the retreating groove formed on an outer annular surface of the lock shaft and arranged along an axial direction of the lock shaft; the lock shaft having
a limiting groove extending along the axial direction of the lock shaft; the limiting segment of the second lock cylinder base movably mounted in the limiting groove such that the second lock cylinder base and the lock shaft simultaneously rotate with respect to the first lock cylinder base, and the lock shaft being capable of moving axially with respect to the second lock cylinder base; and
a mounting hole;

a locking unit mounted in the mounting hole of the lock shaft; and
a locking elastic unit mounted in the mounting hole; the locking elastic unit pushing the locking unit and making the locking unit protrude out of the mounting hole and abut the inner surface of the first lock cylinder base or abut the unlocking wall of the locking groove; the locking unit being capable of sliding with respect to the unlocking wall to be detached from the locking groove along with the rotation of the lock shaft;
wherein:
when the anti-vandal padlock is in the locked state, at least one of the lock bolts is mounted in one of the first bolt holes and one of the second bolt holes at the same time to prevent the first lock cylinder base and the second lock cylinder base from rotating with respect to each other, the locking unit is located in the locking groove of the first lock cylinder base, and the locking wall of the locking groove stops the locking unit such that the lock shaft is unmovable axially and is restricted to abut the at least one ball with the abutting wall; and
when the anti-vandal padlock is in the unlocked state, none of the lock bolts is mounted in one of the first bolt holes and one of the second bolt holes at the same time, the first lock cylinder base and the second lock cylinder base are rotatable with respect to each other, the locking unit is located outside the locking groove of the first lock cylinder base and abuts the inner surface of the first lock cylinder base, and the lock shaft is axially movable and the retreating groove is aligned to the at least one ball.