A multi-key lock core includes a housing, a driving cylinder, a plurality of circular lock plates, and a lock rod. The driving cylinder is disposed in the housing, a sidewall of the driving cylinder is provided with a penetration portion, and the driving cylinder is rotatable to the penetration portion to correspond to an engagement recessed portion. The circular lock plates are disposed in the driving cylinder and each include an outer edge provided with a first recessed portion, and the outer edge of at least one of the circular lock plates is further provided with a second recessed portion. The lock rod is disposed in the penetration portion, and may partially enter the engagement recessed portion to restrict rotation of the driving cylinder. A first key may push the circular lock plates to rotate to the first recessed portion to correspond to the penetration portion, so that the lock rod can move to partially enter the first recessed portion and detach from the engagement recessed portion. The second key may push the circular lock plates to rotate to the second recessed portion and the first recessed portion to correspond to the penetration portion, so that the lock rod can move to partially enter the second recessed portion and the first recessed portion and detach from the engagement recessed portion.

A lock configured to be operated by a key, which includes a key shank, which at least in a part of its axial length includes a profile which is closed or semi-closed to define at least one cavity including a key coding. The lock includes a plug for receiving the key shank. The plug is rotatable with respect to a housing in the unlocked state of the lock and includes a keyway, which is defined by a predetermined geometry. At least one keyway shaping element is provided, which is formed separate from the plug and is fixed to the plug such that it is immovable relative to the plug when the key shank is inserted into the plug. A protruding portion of the at least one keyway shaping element protrudes into the keyway to redefine its geometry.

A tubular lock for push locking has a lock housing, a switching handle mounted in a front end portion of the lock housing, an upper pin seat and a lower pin seat mounted in the lock housing and the switching handle, and multiple pin assemblies and a core shaft mounted in the upper pin seat and the lower pin seat. A key is only needed when unlocking the tubular lock, and then the tubular lock can be locked by pushing the core shaft. The tubular lock can be used to latch a pivotal mechanism. When the tubular lock is in an unlocking state, the user can switch the latch to the locking angular position or an unlocking angular position by turning the switching handle without using the key. Therefore, flexibility and convenience in using the tubular lock can be efficiently improved.

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.

An anti-vandal padlock has a base, a buckling unit, two anti-sawing sleeves, a ball, and a locking mechanism. The base has a mounting passage and an annular groove formed on an inner surface of the mounting passage. The buckling unit has two straight segments. The second anti-sawing sleeve is rotatably and axially-movably mounted in the mounting passage, and has a ball hole. The ball is mounted in the second anti-sawing sleeve and is capable of protruding out of the ball hole. In the locked state, the locking mechanism makes the ball engage in the annular groove to limit movement of the second anti-sawing sleeve, such that the buckling unit cannot be detached from the second anti-sawing sleeve. The two anti-sawing sleeves are rotatably mounted on the two straight segments such that the buckling unit cannot be sawn off and has a better anti-theft ability.

The invention relates to a closing system having a key (1.1) coded in a quantum-physical manner, which withstands very high mechanical forces, wear, or temperatures. The key consists, for example, of a solid stainless-steel bar having, for example, a diameter of 8 mm and, for example, a length of 120 mm. The coding of the key (1.1) is based on a quantum-physical solid body cryptography. The matter of the solid main body is partially changed in such a way that this change can be read out by means of read-out methods suitable therefor. The coding occurs into the depth of the main body such that external influences such as damage to the surface do not impair the function of the key. The quantum key processed in such a way has no visible or perceptible features of the coding. More than 500 billion different codings are accommodated on a length of approximately 50 mm. The locking system comprises a decoding unit on the lock for decoding the codings, which have been introduced into the solid metal of the key in a quantum-physical manner. The arrangement according to the invention offers a locking system that is extremely resistant to forgery and manipulation, on the basis of quantum-physical solid body cryptography.

An all-plastic, tumbler-free cam lock includes a cylindrical lock body with a flange extending radially from the distal end to be glued to a surface surrounding a mounting hole. The lock body has a bore extending axially and a central spindle received coaxially in the bore. A key has a cylindrical tubular key body insertable concentrically between the lock body shoulder and the distal end of the spindle. A pair of outer key lugs extend radially outwardly from the tubular key body to pass through the key channels of an interior shoulder of the lock body, thus permitting access only by one key configuration. A third key lug extends radially inwardly from the inner surface of the tubular key body to engage a keyway channel of the spindle.

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 key that controls a lock with a cylindrical plug, the key having a shank the body of which has an external, rounded surface and forms a hollow, partially enclosed profile. The external rounded surface is shaped for turning the key in the lock cavity of the lock, while at least in the end part of the lateral section of the shank, an open cavity is created for inserting an arm of the validating lever of the lock. At least a part of the shank is U-shaped or V-shaped fitted with at least one open coding track and/or at least one coding channel with a shaped coding surface.

A lock system may comprise a lock operating key for operating a lock, with the key including a bow and a blade extending from the bow along a longitudinal axis of the blade. The blade may include a blade wall with an arcuate main wall portion and a pair of side wall portions extending radially inward from opposite sides of the main wall portion. Bitting may be formed on the blade and be positioned on at least one of the side wall portions of the blade wall. The lock system may also include a lock plug defining a keyway having a transverse keyway profile configured to receive the blade of the key, with at least a portion of the keyway having an arcuate shape to receive the arcuate main wall portion of the blade wall of the key.