Abstract: A locking device which can be unlocked even in the dark by a simple operation such as inserting a card key, wherein a slit is provided in a casing for receiving the card key, a slider is provided movably inside the casing, a tumbler is inserted movably into the slider and protruding its point into the slit, and an engaging projection is provided on the tumbler. The engaging projection comes into engagement with a groove provided on the bottom of the casing so that the movement of the slider is prevented for completing a locking process. A card key provided with a plurality of holes of different diameters is inserted into the slit for moving the tumbler to an unlocking position, so that the engaging projection is disengaged from the groove to allow the slider to move in a predetermined direction for completing an unlocking process.

Abstract: A wire lock comprising a take-up unit which encloses therein a locking wire so that the wire can be drawn out against the biasing force of a spring and rewound by the same force. A locking member is connected to a projecting end of the wire. The locking member can be brought into engagement for locking can be disengaged for unlocking only by a preset unlocking means. A movement preventing means prevents the movement of the wire at least in the drawing-out direction of the wire. The movement preventing means is attached to the take-up unit so that the inhibition of the wire movement can be released manually. With this construction, a locked object suspended from the wire lock can be carried while holding the wire lock by hand.

Abstract: A locking device in which retaining holes for fitting therein both end portions of a U-shaped retaining rod are formed in the outer periphery of a cylindrical body case with a combination lock attached integrally thereto, the cylinder lock being adapted to be unlocked by combining numerals thereon into a predetermined unlocking number, and a retaining piece for engagement and disengagement with and from retaining grooves formed in both end portions of the retaining rod is disposed within the body case, and when the combination lock is in an unlocked state, the retaining piece is moved out of engagement with the retaining grooves in a longitudinal direction of the body case by operation from the exterior of the case.