Abstract: An accessory lock assembly includes a latch assembly, an outer knob assembly mounted on one side of a door panel to connect with the latch assembly, an inner knob assembly mounted on another side of the door panel to connect with the latch assembly, and a lock reinforcing arrangement engaged between the outer and inner knob assemblies to block rotational movements of the outer and inner knob assemblies with the door panel. The inner knob assembly includes an inner actuation unit connecting with the latch assembly and at least a security binding element having a securing end connected to the outer knob assembly and an opposed operating end securely connected to the inner actuation unit within a receiving cavity of a protection shelter in such a manner that the operating end of the connecting element is isolated from outside of the accessory lock assembly by the protection shelter.

Abstract: A combination lock includes a lock body, a locking latch, a numerical actuation unit including a plurality of number rotors and a plurality of locking rings, and a password reset unit. The password reset unit includes a reset driver slidably extended at the lock body to couple with the locking rings, wherein when the reset driver is moved to drive the locking rings to slidably disengage with number rotors, the number rotors are free to rotate on the lock body to reset a new number-combination, such that when the reset driver is released that the locking rings are slidably returned back within the number rotors, the detachable end of the locking latch is unlocked once the number rotors are rotated at the new number-combination.

Abstract: A lock enhancing device for a key comprising a lock core having a cylindrical core body with a first retaining groove formed on a rear core end and a lock sleeve having with a rear housing end comprises an axial movement stopper formed as a C-shaped ring having an inner stopper circumferential surface and outer stopper circumferential surface. The inner stopper circumferential surface and outer stopper circumferential surface is capable of being disposed in relation with the lock core and core sleeve in such a manner that the inner stopper circumferential surface engages with the first retaining groove while the outer stopper circumferential surface presses against the rear housing end of core sleeve in order to enhance structural resistance against an axial force for pulling the lock core out of the lock sleeve.

Abstract: A lock enhancement arrangement for protecting a cylinder lock, from being damaged by an axial tension is disclosed. The lock enhancement arrangement comprises a lock body having a lock channel defining an axial lock cavity and an axial reinforcing cavity, a lock unit which is adapted for actuating a latch assembly, comprising a lock cylinder disposed in the lock cavity for a corresponding key to actuate the latch assembly and a pin seat radially extended from the lock cylinder at a position within the reinforcing cavity, and a retention member, having an axial retaining slot, securely supported within the reinforcing cavity, wherein the pin seat of the lock unit is substantially engaged with the retaining slot of the retention member to block an axial movement of the lock cylinder within the lock cavity so as to substantially retain the lock unit within the lock channel of the lock body.

Abstract: A lock for locking a door panel to a door frame, which includes a knob assembly comprising a front protective housing and a rear knob frame defining a lock cavity therebetween in the door panel; a door latch assembly including a latch actuation member transversely disposed within the lock cavity and a locking latch connected to the latch actuation member in a slidably movable manner; an actuation unit to actuate the door latch assembly; and a lock enhancing device which includes a reinforcing member for substantially mounting to the door panel between the front and the rear side thereof, and a latch guider integrally extended from the reinforcing member within the lock cavity to couple with an inner end portion of the latch actuation member so as to substantially retain the latch actuation member within the lock cavity in position.