A plug socket securing device, particularly one for use with an equipment provided with a plug socket having a slot formed by a resilient tab on the plug socket and features electrical or
signal transmission function, comprising, a closure to be inserted into the plug socket for covering the plug socket; at least one
fastener connected to the closure and being movable, in relation to the closure, between a first position, allowing the closure to attach and detach from the slot of the socket plug and a second position preventing the closure inserted in the plug socket from detaching from the plug socket; and a lock mechanism, assembled to the closure for actuating the
fastener, the lock mechanism being switchable between an unlocked state and a locked state, where in the unlocked state, the lock mechanism forces the
fastener to be retrained to the second position so as to prevent the plug socket from connecting to other articles. Based on such disclosures, this invention may further provide a connecting element, such as a cable, on the closure or the lock mechanism, wherein the connecting element affixes the equipment having the plug socket to a fixture, such as a table, thereby preventing theft of the equipment. Under the state where the equipment is affixed to the fixture, the plug socket may further provide an interface connected to the plug socket where the interface may be connected to other objects, such as a
transmission line, thereby allowing indirect connection with the plug socket.