US Patent 9202089 Portable interface device assembly and interface device thereof

An interface device is for coupling a payment card to an electronic device so as to allow the electronic device to access the payment card. The interface device includes a housing, a switching unit movably connected to the housing, a circuit board brought to move relative to the housing by the switching unit, a card interface disposed on the circuit board, and a connecting interface to be coupled to the electronic device. The connecting interface and the circuit board cooperate to define a card slot for containing the payment card therein. The interface device is operable to switch between a retracted state, in which the connecting interface is contained in the housing, and an exposed state, in which the connecting interface protrudes from the housing.