The invention relates to locking devices of enhanced security. primarily locks for locking dead bolt systems of safes, metal doors of residential buildings, public and other buildings and offices, as well as to padlocks, etc., where a high level of resistance to breaking is required.

A dual key lock core and a key lock core assembly using the same are provided. The dual key lock core of the present invention includes a lock core rod, a driving rod, and an outer barrel. The lock core rod includes a wedging part and an inner barrel disposed at opposite ends. The inner barrel has a hollow guiding groove, an inner barrel protrusion, and a first lock structure. The driving rod is rotatably capped within the inner barrel. One end of the outer surface of the driving rod has a driving protrusion. The other end of the outer surface of the driving rod has a second lock structure. The driving protrusion is in and movable along the hollow guiding groove when the driving rod is capped within the inner barrel.

A cylinder lock with a rotating tumbler pin, a sidebar, and a slider has a keyway with a ward projection into the center of the bitting area of a key blade received by the keyway. The tip of each rotating tumbler pin seats on the bitting surfaces remaining to the sides of this center ward of the key, and the tumbler pins that are engaged by the bitting on the side of the key blade do not seat on more than half of the width of the blade. Half the pin width is removed from each tumbler pin near the tip thereof. The key has a bitted section at which one or more bittings are formed and a non-bitted section bitting that is devoid of bitting. The bittings extend at a constant depth to an edge of the key blade.

A latch mechanism includes a hook-handle assembly coupled to a first panel and a clevis coupled to a second panel. The hook-handle assembly engages the clevis to secure the first panel relative to the second panel.

A padlock with an associated locking mechanism is configured for use in a lock configured to be locked and unlocked by a key. The locking mechanism includes a lock cylinder with a key-receiving end configured to interface with the key and further includes a cam positioned at an axial end of the lock cylinder opposite the key-receiving end thereof. The cam is integrally connected thereto thereby restricting axial and rotational motion of the cam with respect to the lock cylinder and can be used to retain components of the locking mechanism (such as tumblers and springs) in the lock cylinder.

A tubular lock assembly has a tubular lock, a cover, and a disassembling unit. The tubular lock has an annular keyhole and a cover screw hole enclosed by the keyhole. The cover is detachably assembled with the tubular lock, and has a covering board segment, a screw rod segment, and a first fitting segment. The covering board segment covers the keyhole. The screw rod segment is detachably screwed in the cover screw hole of the tubular lock. The first fitting segment is formed on the covering board segment. The disassembling unit has a second fitting segment. The second fitting segment corresponds in shape and size with the first fitting segment of the cover, such that the second fitting segment is adapted to engage with the first fitting segment, and the disassembling unit is capable of rotating the cover.

A tubular lock assembly has a tubular lock, a cover, and a disassembling unit. The tubular lock has an annular keyhole and a cover screw hole enclosed by the keyhole. The cover is detachably assembled with the tubular lock, and has a covering board segment, a screw rod segment, and a first fitting segment. The covering board segment covers the keyhole. The screw rod segment is detachably screwed in the cover screw hole of the tubular lock. The first fitting segment is formed on the covering board segment. The disassembling unit has a second fitting segment. The second fitting segment corresponds in shape and size with the first fitting segment of the cover, such that the second fitting segment is adapted to engage with the first fitting segment, and the disassembling unit is capable of rotating the cover.

A latch mechanism includes a hook-handle assembly coupled to a first panel and a clevis coupled to a second panel. The hook-handle assembly engages the clevis to secure the first panel relative to the second panel.

A locking system may include a first cylinder portion may be extended along a main axis, a second cylinder portion may be extended along the main axis, a front plate may be coupled and rotatable with the first cylinder portion, a plurality of code pins, a plurality of spring-loaded driver pins, a main shaft may be disposed within a first central hole, a second central hole, and a key. The key may include an elongated key shaft and a plurality of key needles may be extended parallel with the elongated key shaft. The main shaft may be configured to be coupled to and rotatable with one of the first cylinder portion and the second cylinder.

A locking system may include a first cylinder portion may be extended along a main axis, a second cylinder portion may be extended along the main axis, a front plate may be coupled and rotatable with the first cylinder portion, a plurality of code pins, a plurality of spring-loaded driver pins, a main shaft may be disposed within a first central hole, a second central hole, and a key. The key may include an elongated key shaft and a plurality of key needles may be extended parallel with the elongated key shaft. The main shaft may be configured to be coupled to and rotatable with one of the first cylinder portion and the second cylinder.