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 laminated padlock, having a lock body, a shackle moveably mounted to the lock body, a cylinder unit received within the lock body, the cylinder unit has cylinder core rotatably received within the lock body between a locking position and a releasing position, and an activating member synchronously coupled to said cylinder core. A latching arrangement provided for associating the cylinder unit and the shackle, which has a pair of striking chip received within the lock body with an opposite moveable manner for managing a release of the shackle, in the locking position, the activating member is capable of driving two striking chips outwardly extended to insert into the shackle legs for locking up the shackle, in the releasing position, the activating member is capable of inwardly retracting the striking chips from the shackle legs so as to disengage the shackle legs from the lock body.

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: 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 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.

Abstract: An assembled lock cylinder comprises a cylindrical core having a cylindrical outer surface and an end face and defining at least one through hole through the wall of the cylindrical core; a connecting plug having a cylindrical portion inserted into the cylindrical core through the end face and defining at least one pin hole extending inwards from the surface of the cylindrical portion; and at least one pin. The connecting plug has at least one protrusion extended outwards from the outer surface thereof that is inserted into the cylindrical core. The cylindrical core has at least one receiving recess sized to receive the protrusion. When the connecting plug engages the cylindrical core the through hole aligns with the pin hole and the pin can be exactly mounted into the through hole and the pin hole, so the connecting plug cannot move axially and circumferentially with respect to the cylindrical core.

Abstract: The present invention provides a padlock that comprises a shackle, a lock body, a lock cylinder assembly disposed at the middle portion in the lock body, and a combination lock assembly. The padlock of the invention can be operated by either the key or the cipher. The invention also provides a padlock having an interchangeable lock cylinder assembly.

Abstract: The present invention is directed to a lock with a master cylinder that is highly resistant to pulling. The lock comprises a lock body 10 with a hole, a master cylinder 20 rotatably mounted within the cylindrical hole of the lock body, and tumbler unit 30 mounted in the master cylinder wherein at least one metal pull resistant element 40 is inserted between the outer surface of the master cylinder and the inner surface of the wall of the cylindrical hole in the lock body. The metal pull resistant element prevents the master cylinder from being pulling out of the lock body in an axial direction. The metal pull resistant element 40 may be a ball, a cylinder or a block inserted 20 and held in place between an indentation 21 provided on the outer surface of master cylinder and an annular concavity provided on the inner wall surface of the cylindrical hole for the master cylinder in the lock body 10 and at a location opposite to the indentation 21.