A door lock has an inner door assembly, an indoor doorknob assembly, and an outdoor doorknob assembly. The inner door assembly has a locking assembly casing. The indoor doorknob assembly has a positioning resilient component located in the locking assembly casing and configured to switch the door lock between a locked state and an unlocked state. The door is provided with enhanced protection by enclosing the positioning resilient component in the locking assembly casing, so the safety is further improved.

A door lock has an inner door assembly, an indoor doorknob assembly, and an outdoor doorknob assembly. The inner door assembly has a locking assembly casing. The indoor doorknob assembly has a positioning resilient component located in the locking assembly casing and configured to switch the door lock between a locked state and an unlocked state. The door is provided with enhanced protection by enclosing the positioning resilient component in the locking assembly casing, so the safety is further improved.

The anti-theft device is configured in a door lock, and contains a first blocking piece, a second blocking device, a positioning piece, and a lever. The first blocking piece contains a first section and a second section bended and extended perpendicularly from the first section. The first section has a first through hole and a second through hole. The lever is engaged by a lock heart of the door lock. When the door lock is locked, the lock heart is turned to engage the lever so that the lever drives the first blocking piece downward by its first through hole. The second section of the first blocking piece as such blocks a lock tongue of the door lock so that the door lock cannot be opened without using key.

A multi-point locking arrangement is provided. The multi-point locking arrangement includes a primary lock bolt and an auxiliary lock bolt offset from the primary lock bolt. The multi-point locking arrangement, in an embodiment, uses a single actuation motion to transition between locked and unlocked states. The locking arrangement may also include a lockout device that prevents transitioning from the unlocked state to the locked state when the lockout device is not actuated. The locking arrangement may include a biased auxiliary strike plate that cooperate with the auxiliary lock bolt to provide improved alignment and a tighter seal.

A multi-point locking arrangement is provided. The multi-point locking arrangement includes a primary lock bolt and an auxiliary lock bolt offset from the primary lock bolt. The multi-point locking arrangement, in an embodiment, uses a single actuation motion to transition between locked and unlocked states. The locking arrangement may also include a lockout device that prevents transitioning from the unlocked state to the locked state when the lockout device is not actuated. The locking arrangement may include a biased auxiliary strike plate that cooperate with the auxiliary lock bolt to provide improved alignment and a tighter seal.

A bolt assembly usable in a mortise lock. The assembly includes a bolt and tailpiece that are pivotable relative to one another. In one embodiment, the bolt and tailpiece are joined by a pin that permits the components to pivot relative to one another.

A bolt assembly usable in a mortise lock. The assembly includes a bolt and tailpiece that are pivotable relative to one another. In one embodiment, the bolt and tailpiece are joined by a pin that permits the components to pivot relative to one another.

A lock mechanism for an inactive door includes a housing configured to receive a locking element from an active door lock. A slide is movably received in the housing and includes a drive bar connection element, wherein when the slide is in an unlocked position, the drive bar connection element is located in a path of travel of the deadbolt, and wherein when the slide is in a locked position, the drive bar connection element is located outside the path of travel of the deadbolt. At least one drive bar at least partially received in the housing and is connected to the drive bar connection element. The drive bar is actuated by an actuator located remote from the housing. A blocking element located within the housing, wherein the blocking element prevents movement of the slide from the locked position to the unlocked position.

A lock assembly, comprising: a lock cylinder comprising a cam; a deadbolt comprising a first cam follower and a second cam follower, each of the first cam follower and the second cam follower being configured to receive the cam; wherein rotation of the lock cylinder in a first rotational direction causes the cam to communicate with the first cam follower to drive the deadbolt from a retracted position to a first extended position, and further rotation of the lock cylinder in the first rotational direction causes the cam to com- municate with the first cam follower to drive the deadbolt from the first extended position to a second extended position; wherein rotation of the lock cylinder in a second rotational direction opposite to the first rotational direction causes the cam to communicate with the second cam follower to drive the deadbolt from the second extended position to the first extended position, and further rotation of the lock cylinder in the second rotational direction causes the cam to communicate with the first cam follower to drive the deadbolt from the first extended position to the retracted position.

A handle locking structure includes a handle having a pivot portion pivotally connected to a sliding box, a buckle portion for hooking on a cabinet and a handle shaft, and a positioning structure including a base connected to the handle shaft, a positioning device mounted in the base and an elastic member placed on the positioning device. When the handle is hooked on the cabinet, a peripheral limiter of a head member of the positioning device is disengaged from a position-limiting notch of the base to reset the elastic member, so that the positioning device is automatically locked to the sliding box, avoiding vibration of the handle and improving the locking stability of the handle.