The present disclosure provides for a lock cylinder having a rotatable spindle with at least one disc and at least one wafer housing rotatingly engaged therewith. A slidable wafer is carried on the wafer housing. A locking bar is operable to prevent rotation of the lock cylinder in a locked position and permit rotation of the lock cylinder in an unlocked position.

A lock core structure composed of a lock core seat, a lock core shell, a push plate, lock plates, washers, a positioning plate, a latch lever, a brake bolt plate pushed by a compression spring, a positioning baffle, and a retaining ring. An accommodating chamber of the seat is provided with an accommodating groove, a ring groove, a shaft hole and a groove, an inner bottom surface of the shell is provided with a slide groove for disposing the push plate, the brake bolt plate is provided in the accommodating groove, and provided with a pivot shaft disposed in the shaft hole, the positioning baffle is provided in the chamber and provided with a first baffle corresponding to an embedding groove of the seat, and a second baffle corresponding to the accommodating groove and the groove, and the retaining ring is embedded in the ring groove.

A lock for pick prevention includes a set of cylinder pins aligned in a row in a cylinder. A first set of security pins are in a first carriage assembly. The security pins are aligned to a keyed displacement in cooperation with the set of cylinder pins. A second carriage assembly is positioned angularly displaced from the position of the first carriage assembly. One of the second set of security pins is aligned to the same keyed displacement as a corresponding one of the first set of security pins. An obstructive device is coupled to the second set of security pins, which is disposed to obstruct the cylinder from reaching an unlocked position in the event, a displacement of the second set of security pins does not align with the same keyed displacement as the first set of security pins.

A cylinder lock comprises a cylinder housing (11) and a cylinder core (13) which is rotatably mounted in the cylinder housing. A plurality of plate tumblers (21) are provided in the cylinder core, wherein each of the plurality of plate tumblers is movable between a locking position and an unlocking position. At least one of the plurality of plate tumblers has a bolt-receiving depression (47). The cylinder lock further comprises at least one bolt element (27) which has a bolt tip (35), wherein the bolt element is movable between a blocking position and a release position. In the release position, the bolt tip engages in the bolt-receiving depression of the plate tumbler. The plate tumbler has, adjacent to the bolt-receiving depression, at least one bolt latch-in depression (45) in which the bolt tip of the bolt element engages in a latching manner when the at least one plate tumbler is moved out of the unlocking position, wherein the bolt latch-in depression is less deep than the bolt-receiving depression.

A key cylinder device includes a rotor case that encloses a rotor operable to rotate by a mechanical key, the rotor being inserted into the rotor case from a direction opposite to an insertion direction of the mechanical key, a holding member including a pair of leg portions held by the rotor case, and a fixing member that protrudes from the holding member. The rotor case includes a fixing member-holding structure that the fixing member is held by the leg portions of the holding member at a temporary assembly position for temporarily assembling the fixing member in a retracted state without inwardly protruding beyond an inner surface of the rotor case and at an assembly position for assembling the fixing member in a state of inwardly protruding from the inner surface of the rotor case.

The present disclosure provides for a lock cylinder having a rotatable spindle with at least one disc and at least one wafer housing rotatingly engaged therewith. A slidable wafer is carried on the wafer housing. A locking bar is operable to prevent rotation of the lock cylinder in a locked position and permit rotation of the lock cylinder in an unlocked position.

A bridge tumbler lock has tumblers that both slide and pivot, with their motion controlled by pairs of key interfaces. A sidebar is released to permit lock opening movement when all tumblers are in their correct positions. This results in a lock that is resistant to release of information due to partially correct key combinations occurring in the course of a lock picking attempt and thus enables enhanced security in an economical, effective lock construction.

A lock including a set of tumblers preserving their position after contact with a key to permit blocking of the keyhole during the opening process.

A cylinder lock assembly includes a lock cylinder inserted into a cylindrical chamber of a lock housing, the lock cylinder being formed with plate mounting slots, a latch slot, and a main key slot; primary locking plates inserted in the respective plate mounting slots, each of the primary locking plates being formed with a secondary plate recess, a first key slot, and a first latch groove; secondary locking plates inserted in the respective secondary plate recesses, each of the secondary locking plates being formed with a second key slot and a second latch groove, springs being provided between the primary locking plates and the lock cylinder and between the secondary locking plates and the lock cylinder respectively; and a latch inserted into the latch slot, a latch return spring being provided between the latch and the lock cylinder.