US Patent 7415853 Dual locking device

A dual locking device is provided for securing a plugging member of a case, such as a luggage case or suitcase or the like, and comprises a housing, a switching mechanism, a restriction member and two locking devices. The switching mechanism includes a push-button and a securing member movable relative to the housing between a locked position and an unlocked position. Additionally, the restriction member is controlled by the locking devices respectively for retaining the switching mechanism, and is movable either through a first route between a retaining position and a first releasing position or through a second route between the retaining position and a second releasing position.