Provided is a combination lock capable of being opened by inserting a key into keyhole in addition to turning tumbler wheels to a set series of numbers. In the key opening operation key is turned to rotate shaft, cam, and shuttle assembly for aligning tabs with the grooves, causing the cam to contact and push an L-shaped member laterally to compress a spring-loaded member for opening a gap between the leg and the shackle with a distance between the shaft and a blind end of a channel of the shuttle assembly being decreased to a minimum as the channel slides relative to the shaft, and moving the tabs along the grooves to project the shuttle assembly from one end of a bore of a spring-loaded moveable member to the other end thereof.

A security check hanging lock structure including a lock housing, a first (private) lock mechanism, a second (common) lock mechanism, a first locking member and a second locking member. Each of the first and second locking members has a base end pivotally disposed in the lock housing and a free end extending to outer side of the lock housing. The free ends of the first and second locking members are connectable to form a hanging hook. The first and second lock mechanisms are disposed in the lock housing for drivingly controlling the movement of the first and second locking members. By means of unlocking the first and second lock mechanisms, the free ends of the first and second locking members can be respectively driven to displace away from each other so as to unlock the hanging lock in two manners.

A cable lock includes a case having a slot defined through a first side and an opening defined through the second side and being in communication with the slot. A flexible cable has one end fixed to the case and a free end of the flexible cable is removably engaged with the opening and the slot. A combination unit is received in the case includes a shaft movably extending through the combination unit. A top plate is connected to a top of the shaft and has a stop plate which is located inside of the second side and movably blocks the opening. A button is pivotably connected to the case and drives an action plate to push the top plate and the shaft downward so as to remove the stop plate away from the opening, and the free end of the flexible cable is able to remove from the opening.

A buckle lock includes a casing, a lever on the casing and including two front bottom legs and a rear button, a tumbler wheel assembly including a spring biased shaft having a rear slope, a sliding block in the chamber and having a transverse passage, a key turning assembly including an inward protrusion and a key shaft, a sliding member on the key shaft and including a wedge, an opposite projecting bar, and a top mark aligned with the window when the key turning assembly is operable, and a tongue. Turning the dials to a correct combination and pressing the button will enable a manipulation of the wedge for sliding the sliding member toward the sliding block until the sliding block is blocked by the engaged projecting bar and the mark is misaligned with the window, thereby visually informing a person that the key turning assembly is disabled.

A padlock having dual unlocking modes includes a lock body that has shackle and a combination locking mechanism, and a movable push button assembly on one side. The padlock may be switched to an unlocking condition by operating the combination locking mechanism so that users can depress the movable push button assembly to drive the shackle to unlatch. The movable push button assembly also has a key hole to receive a key when the combination locking mechanism is in the locking condition to turn the movable push button assembly and unlatch the shackle.