A method for mutually controlling and unlocking a dual plug in a lock, comprising: unlocking a code of a first plug first, the first plug restricting unlocking of a second plug, the second plug restricting rotating of the first plug before the code of the first plug is unlocked; after unlocking the code of the first plug, the first plug translating to a second position from a first position using a preset position difference, the first plug being unable to rotate during the translation; after moving the first plug to the second position, the first plug releasing a restriction on the second plug, the second plug still restricting the rotating of the first plug; and unlocking the code of the second plug, the first plug and the second plug being able to rotate synchronously so as to unlock the lock after unlocking the code of the second plug. The present invention further relates to a lock with a dual plug.

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 linearly-actuated lock including a housing, a lock case received within the housing along an axis, and a lock barrel rotatable relative to the lock case between a locked state and an unlocked state. The lock barrel includes tumblers and tumbler springs. The lock further includes a key insertable into the lock barrel to displace the tumblers relative to the lock barrel in a direction parallel to the axis and a sidebar extending through apertures of the lock barrel. The sidebar is engageable with a notch of the tumblers when the sidebar moves radially inward relative to the axis. The sidebar includes a cam surface slidable against at least one of the housing and the lock case when the lock barrel rotates. The sidebar also includes a projection having a single-ramped surface received within the notch of each tumbler when the lock barrel is in the unlocked state.

A vehicle includes a chassis, a body, and a door assembly. The body is supported by the chassis, and defines a driver compartment and a cargo compartment. The driver compartment has a cab opening and the cargo compartment has a cargo opening. The door assembly is coupled to the body and provides selective access into the driver compartment and into the cargo compartment through the cab opening and cargo opening, respectively. The door assembly includes a first door and a second door. The first door is movable between a first position extending across the cab opening and a second position extending at least partially across a portion of the cab opening. The second door is movable between a third position extending across the cargo opening and a fourth position extending at least partially across a portion of the cab opening.

A method for mutually controlling and unlocking a dual plug in a lock includes: unlocking a code of a first plug first, the first plug restricting unlocking of a second plug, the second plug restricting rotating of the first plug before the code of the first plug is unlocked. after unlocking the code of the first plug, the first plug translating to a second position from a first position using a preset position difference, the first plug being unable to rotate during the translation; after moving the first plug to the second position, the first plug releasing a restriction on the second plug, the second plug still restricting the rotating of the first plug; and unlocking the code of the second plug, the first plug and the second plug being able to rotate synchronously so as to unlock the lock after unlocking the code of the second plug.

A lock cylinder having a barrel and a lock housing, the barrel having a locking cam pivotally mounted therein, the locking cam including at least one recess on an outer periphery thereof, a housing recess formed on an inner wall of the lock housing, a locking member that, in a locking position, is positioned at least partly in the housing recess formed on the inner wall of the lock housing, the at least one recess on the locking cam including a first recess on the locking cam, the first recess being sized to enable the locking member to move out of the housing groove, the barrel having a key slot for receiving a key, the key including a projection for causing the locking cam to rotate to bring the first recess on the locking cam adjacent to or into alignment with the locking member such that the locking member moves out of the housing recess and into the first recess of the locking cam and barrel slot to thereby enable rotation of the barrel in the lock housing.

The locking device includes a key having a cylindrical shaft in which a guide groove is formed in the axial direction, and a cylinder lock which includes an outer cylinder, an inner cylinder, a locking bar and a tumbler, the inner cylinder has an inner cylinder main body rotatably accommodated in the outer cylinder, a rod fixed to the inner cylinder main body, and a key insertion slot, the locking bar is interposed between the inner cylinder main body and the outer cylinder and prevents the rotation of the inner cylinder by engaging and disengagingly locking the inner cylinder main body and the outer cylinder, and the tumbler has a guide convex portion engageably and detachably engaged with the key groove, and an inner concave portion rotatably received in the inner cylinder and dropping the locking bar.

The locking device includes a key having a cylindrical shaft in which a guide groove is formed in the axial direction, and a cylinder lock which includes an outer cylinder, an inner cylinder, a locking bar and a tumbler, the inner cylinder has an inner cylinder main body rotatably accommodated in the outer cylinder, a rod fixed to the inner cylinder main body, and a key insertion slot, the locking bar is interposed between the inner cylinder main body and the outer cylinder and prevents the rotation of the inner cylinder by engaging and disengagingly locking the inner cylinder main body and the outer cylinder, and the tumbler has a guide convex portion engageably and detachably engaged with the key groove, and an inner concave portion rotatably received in the inner cylinder and dropping the locking bar.

An exemplary lock cylinder includes a shell, a plug positioned in the shell, and a locking assembly. The locking assembly is configured to prevent rotation of the plug when no key is inserted, and to permit rotation of the plug upon insertion of any of a plurality of keys having different bitting profiles. The locking assembly may further be configured to prevent key extraction when the plug is in a rotated position.

A lock is provided, including a sleeve member, a main body and an engaging member. The main body is rotatably disposed in the sleeve member and has a first connecting portion, one of the main body and the sleeve member has a slide slot which extends along an axial direction and the other has a protrusive block, when the protrusive block corresponds to the slide slot in the axial direction, the main body is movable relative to detachable from the sleeve member. The engaging member is rotatably disposed in the sleeve member and has a second connecting portion, one of the engaging member and the main body has a hook and the other has a slot, when the first and second connecting portions are assembled to each other, the engaging member and the main body are co-rotatable, and the hook is engaged with the slot.