A key storage device (1) has a tubular housing (8) having an open proximal end (14) and a distal end (15), and a sliding carriage (2) which is insertable into the proximal end (14) of the housing (8). The sliding carriage (2) has a compartment (4) for a key to be stored, and is displaceable between an open position in which a majority of the sliding carriage (2) is outside of the housing (8) and the compartment (4) is accessible for key retrieval, and a closed position in which the majority of the sliding carriage (2) is inside the housing (8) and the compartment (4) is inaccessible. A lock mechanism (12) is arranged within the tubular housing (8). It has a locked state in which the sliding carriage (2) is kept locked in its closed position and prevented from being displaced to its open position, and an unlocked state in which the sliding carriage (2) may be displaced to its open position. The lock mechanism (12) has a piston (5) and a catch member (7) which are both movable between respective first positions in the locked state of the lock mechanism (12) and respective second positions in the unlocked state of the lock mechanism (12). An electric motor (28) is coupled for causing movement of the piston (5) of the lock mechanism (12). A control unit (35) is adapted to cause the lock mechanism (12) to switch from its unlocked state to its locked state by actuating the motor (28) and thereby causing movement of the piston (5) from its second position to its first position, the movement of the piston (5) in turn causing movement of the catch member (7) from its second position to its first position. The control unit (35) is also adapted, based on an external input (29), to allow the lock mechanism (12) to switch from its locked state to its unlocked state by actuating the motor (28) and thereby causing movement of the piston (5) from its first position to its second position, the movement of the piston (5) in turn allowing movement of the catch member (7) from its first position to its second position.

A device for locking a machine or other movable device in place includes a supporting mechanism, two locking members, and a pushing mechanism. The pushing mechanism includes a sleeve, a driving member, a pushing member, a driven member, and locating members. At least one first guiding opening and at least one second guiding opening are defined on the sleeve. A first surface is defined on the driving member. A second surface is defined on the driven member. The driving member moves the driven member. The driven member rotates under interaction of the first and second surfaces. The driven member drives a free end of each locating member to move. The driven member drives the pushing member to lever free ends of the two locking members apart or moves the pushing member to bring the free ends of the two locking members closer.

A device for locking a machine or other movable device in place includes a supporting mechanism, two locking members, and a pushing mechanism. The pushing mechanism includes a sleeve, a driving member, a pushing member, a driven member, and locating members. At least one first guiding opening and at least one second guiding opening are defined on the sleeve. A first surface is defined on the driving member. A second surface is defined on the driven member. The driving member moves the driven member. The driven member rotates under interaction of the first and second surfaces. The driven member drives a free end of each locating member to move. The driven member drives the pushing member to lever free ends of the two locking members apart or moves the pushing member to bring the free ends of the two locking members closer.

A disc tumbler lock assembly includes a lock cylinder inserted in a lock cylinder chamber of a lock housing, the lock cylinder being formed with a disc cavity and a lug groove; inner locking discs each having a first key hole with a first locking tooth therein, a side of each inner locking disc being formed with a first latch notch and a first lug located in the lug groove; outer locking discs each having an inner locking disc room and a second key hole with a second locking tooth therein, a side of each outer locking disc being formed with a second latch notch and a second lug located in the lug groove; the inner and outer locking discs being arranged in pairs, a corresponding one of the inner locking discs being disposed in the inner locking disc room of a corresponding one of the outer locking discs.

A disc tumbler lock assembly includes a lock cylinder inserted in a lock cylinder chamber of a lock housing, the lock cylinder being formed with a disc cavity and a lug groove; inner locking discs each having a first key hole with a first locking tooth therein, a side of each inner locking disc being formed with a first latch notch and a first lug located in the lug groove; outer locking discs each having an inner locking disc room and a second key hole with a second locking tooth therein, a side of each outer locking disc being formed with a second latch notch and a second lug located in the lug groove; the inner and outer locking discs being arranged in pairs, a corresponding one of the inner locking discs being disposed in the inner locking disc room of a corresponding one of the outer locking discs.