Systems and apparatuses include a lock including a shackle movable between an unlocked state and a locked state, an electronically actuated blocker selectively engaged with the shackle to inhibit movement of the shackle from the locked state to the unlocked state, the blocker movable between a key override disabled position, a key override enabled position, and an electronic unlock position, and a key cylinder structured to move the shackle to the unlocked state when the blocker is in the key override enabled position.

An electric lock system, includes an electric lock and an electric key. The electric lock includes a lock body and a lock core, and the lock body has a key limit slot and a key limit slide. The lock core includes a T-shaped magnet, a solenoid and a lock pin. The T-shaped magnet is fixed to the lock core, and the lock pin is connected to the solenoid, the solenoid can generate a magnet field when energized, and the magnet field generate a force with the T-shaped magnet, and drives the lock pin to stop limiting the lock body. The electric key includes a lithium battery and a metal housing, and the metal housing has a key limit head corresponding to a shape of the key limit slot. The electric key provides electric power to the lock core by contacting the key limit head to the key limit slot.

A padlock comprising a body/housing which contains a fin-catcher and a plate-hole to receive the coupling-plate, a shackle which contains a short-leg and long-leg, so that the short-leg can move away from the locking-hole to control the locking and opening position, a plurality of clutches to prevent the lock from being opened when the dials are not in a lock open by combination code, and a plurality of dials to control the rotational movement of the clutches.

A padlock comprising a body/housing which contains a fin-catcher and a plate-hole to receive the coupling-plate, a shackle which contains a short-leg and long-leg, so that the short-leg can move away from the locking-hole to control the locking and opening position, a plurality of clutches to prevent the lock from being opened when the dials are not in a lock open by combination code, and a plurality of dials to control the rotational movement of the clutches.

A padlock includes a case including a main part and a board which is mounted to the main part. The main part includes a room therein and a block is located in the room. A lock cylinder is located in room and includes a keyhole and shaft. A chamber is formed in block in the room. The board includes an operation space and a shackle is movably located in the operation space. A notch is defined through the board and communicates with the chamber. The shackle includes an engaging hole in which the shaft of the lock cylinder is securely engaged. The staple is inserted into the notch and an end of the shackle pivotably passes through the notch and the chamber, and the staple when operating the lock cylinder. The shackle is hidden in the case and difficult to be accessed from outside of the case.

A padlock includes a case including a main part and a board which is mounted to the main part. The main part includes a room therein and a block is located in the room. A lock cylinder is located in room and includes a keyhole and shaft. A chamber is formed in block in the room. The board includes an operation space and a shackle is movably located in the operation space. A notch is defined through the board and communicates with the chamber. The shackle includes an engaging hole in which the shaft of the lock cylinder is securely engaged. The staple is inserted into the notch and an end of the shackle pivotably passes through the notch and the chamber, and the staple when operating the lock cylinder. The shackle is hidden in the case and difficult to be accessed from outside of the case.

An electronic sensor and key operated lock is disclosed which provides users with the option to use at least one of a manually operated mechanism or for example a biometric sensor to unlock the lock. The lock integrates both the manually operated mechanism and a biometric sensor into one device. The manually operated mechanism and a biometric sensor are coupled to a common toggle switch so that operation of at least one of the manually operated mechanism and the biometric sensor moves the toggle switch and a shackle from locked and unlocked positions.

A chain lock includes a top part pivotably connected to a bottom part. An engaging member is located in the bottom part. A lock cylinder, a rotary member and a rod are connected to each other. A torsion spring is biased between the lock cylinder and the rotary member. The torsion spring, the lock cylinder, the rotary member and the rod are located in a movable member to which a compression spring is mounted. Both of the movable member and the compression spring are received in the top part. A chain is secured in a first radial slot of the top part by the movable member, and the other end is inserted in the second radial slot of the bottom part. The chain lock is locked without using the key, and the key is required to unlock the chain lock.

A chain lock includes a top part pivotably connected to a bottom part. An engaging member is located in the bottom part. A lock cylinder, a rotary member and a rod are connected to each other. A torsion spring is biased between the lock cylinder and the rotary member. The torsion spring, the lock cylinder, the rotary member and the rod are located in a movable member to which a compression spring is mounted. Both of the movable member and the compression spring are received in the top part. A chain is secured in a first radial slot of the top part by the movable member, and the other end is inserted in the second radial slot of the bottom part. The chain lock is locked without using the key, and the key is required to unlock the chain lock.

A padlock is configured to be locked and unlocked by a key and includes a lock body having an internal cavity with a locking mechanism and a keyway extending through the lock body into the internal cavity to provide access to the locking mechanism by the key. The locking mechanism is configured to be selectively moved over a range of positions when the key is received therein to lock and unlock the padlock. The keyway has an eccentric profile that permits the key to be removed from the locking mechanism in only a single position of the range of positions.