An apparatus for selectably unlocking a door comprises a base adapted to be mounted within a door, an outer cylinder selectably rotatable relative to the base, the outer cylinder having an central bore therethrough and an inner cylinder selectably rotatably received within the inner bore of the outer cylinder. The inner cylinder has a key slot therethrough and is adapted to unlock a door upon rotation of the inner cylinder. The apparatus further includes a plurality of tumblers extending between the inner and outer sleeves alignable upon insertion of a specific key within the key slot so as to permit rotation of the inner cylinder within the central bore a means for identifying a key inserted within the key slot as an authorized key and a latch operable to selectably couple the outer cylinder to the base wherein the latch uncouples the outer cylinder from the base when an authorized key is located within the key slot.

A lock device comprising: a lock frame defining a cavity and having at least one frame recess; a lock body having a key-receiving face and defining a chamber and the longitudinal wall comprising at least one aperture therethrough emerging in the chamber, each one of the at least one aperture facing a respective one of the at least one frame recess, the lock body being moveable within the cavity of the lock frame; a translation pin movably inserted within the chamber; an active pin positioned within an aperture of the lock body and movable between an insertion position and a retracted position; a moveable magnetic body positioned within the chamber to sequentially prevent and allow motion of the translation pin; and an actuator body movable between a locked position and an unlocked position.

A magnetic lock has a barrel and keyway, the barrel when rotated unlocking the lock. Locking element cavities each contain a moveable locking element such as a ball, movable in response to a magnetic field applied by a magnetic key. A locking bar is movable between a locked position and an unlocked position. The locking bar has coded projections which extend into the respective locking element cavities when the locking bar moves from the locked position to the unlocked position. A code plate is shaped in registration with the coded projections. When the locking bar is in the locked position the code plate and the coded projections form a substantially uninterrupted surface. The locking elements prevent movement of the locking bar from the locked position to the unlocked position except when magnetically moved to a coded position.

Blocking devices to stop movement of mechanical or magnetic coded rotors, pins or discs immediately when the plug is turned.

A locking device and system are disclosed. The locking device includes a barrel within which sets a plug. A plurality of pins sit in pin pathways that extend partially through the barrel and plug and the pins prevent rotation of the barrel within the plug when the ends of the pins are not aligned with a shear line. One of the pins has a recess formed therein within which a locking ball can sit. The engagement or otherwise of the locking ball in the recess is controlled by a linear actuator. When the linear actuator allows the locking ball to disengage the recess the pin with the recess in can engage the key and a line the end of the pin with the shear line.

Electromechanical lock utilizing magnetic field forces. An actuator is moved between a locked position and an unlocked position. In the locked position, a first permanent magnet directs a first magnetic field exerting a pushing force so that rotation of the first axle is blocked, and a second permanent magnet directs a second magnetic field exerting a pulling force so that the first axle is kept uncoupled with the second axle. In the unlocked position, the first permanent magnet directs a reversed first magnetic field exerting a pulling force so that the first axle is released to rotate, and the second permanent magnet directs a reversed second magnetic field exerting a pushing force so that the first axle becomes coupled with the second axle.

Some embodiments include a lock cylinder comprising: a plug assembly having a front portion and a back portion; a housing shell within which the plug assembly is rotatably disposed, wherein the housing shell includes a notch; wherein the back portion of the plug assembly comprises: a locking pin that is movably disposed, and wherein the locking pin is configured to prevent a rotation of the plug assembly when the locking pin is engaged in the notch and prevented from retracting by a multi-stable mechanism; and the multi-stable mechanism having at least two stable configurations corresponding to respectively to a locked state and an unlocked state, wherein the multi-stable mechanism can maintain the stable configurations without consuming energy; wherein, at a first stable configuration, the multi-stable mechanism prevents the locking pin from retracting, and, at a second stable configuration, the multi-stable mechanism enables the locking pin to retract.

A magnetic coding free pin type lock cylinder structure includes: a lock cylinder housing (101), a lock knob (104) disposed within the lock cylinder housing (101), a lock cylinder front end cover (102) and a lock cylinder rear end cover (103). Pin vertically moving grooves (114) and pin horizontally rotary grooves (113) are provided on an inner wall of the lock cylinder housing (101). An unlocking hole (116) for a magnetic coding key (115) is provided on the lock knob (104). A plurality of pin vertical sliding grooves (112) is provided on an outer wall of the lock knob (104). Free pins are provided in at least one of the plurality of pin vertical sliding grooves (112), and the free pins are big pins (107) or small pins (108).

A lock device including a keyway sized and configured to receive a key, a sensor assembly including an optical source and a key height sensor, and a controller in communication with the sensor assembly. The optical source is configured to generate an optical signal, and the key height sensor is configured to generate a key height signal in response to receiving the optical signal. The key is configured to interact with the optical signal such that the key height signal varies based upon the height of the key. The controller is configured to generate a key profile based at least in part upon the key height signal, to compare the key profile to authorization data, to select an action based upon the comparing, and to perform the action.

A magnetic unlocking device and a magnetic unlocking structure of a magnetic encoding key. The magnetic unlocking structure includes a lock core device and a magnetic unlocking device. The lock core device includes a lock core casing, a lock knob which is provided in the internal cavity of the lock core casing, a lock care front end cover and a lock core rear end cover that are located at both ends of the lock core casing. The internal wall of the lock core casing is provided with a monad longitudinal moving groove and a monad horizontal rotating groove. The lock knob is provided with an unlocking hole. The external wall of the lock knob is provided with a monad longitudinal slide-way. The monad longitudinal slide-way and the monad longitudinal moving groove correspond to each other and form a monad moving cavity.