An alternating current/direct current input device includes an appliance input socket and an information and communications technology (ICT) device. The ICT device is powered by the appliance input socket. The appliance input socket includes a ground contact, a positive electrode contact, a negative electrode contact, and a signal switch. A contact depth of the signal switch in the appliance input socket is less than a contact depth of the positive electrode contact or the negative electrode contact in the appliance input socket. The signal switch is configured to generate a control signal when a direct current connector is separated from the appliance input socket. The control signal can be used to enable the ICT device to disconnect the appliance input socket from a conductive electrode of the direct current connector after the ICT device enters a no load state.

A power supply device includes a housing having a socket opening, and a pair of sliding grooves are formed on the socket opening. A guiding piece is formed at a bottom of each sliding groove, and the guiding piece includes a positioning section and a guiding section. A power socket passes through the sliding grooves along the guiding section, and one side of the power socket is abutted against the positioning section so as to contact the socket opening. A cover plate is provided with a pair of clips corresponding to the sliding grooves, and the clips are inserted into the pair of sliding grooves and abutted against a side of the power socket for positioning the power socket.

A power supply device includes a housing having a socket opening, and a pair of sliding grooves are formed on the socket opening. A guiding piece is formed at a bottom of each sliding groove, and the guiding piece includes a positioning section and a guiding section. A power socket passes through the sliding grooves along the guiding section, and one side of the power socket is abutted against the positioning section so as to contact the socket opening. A cover plate is provided with a pair of clips corresponding to the sliding grooves, and the clips are inserted into the pair of sliding grooves and abutted against a side of the power socket for positioning the power socket.

A smart power device includes a control module having a communication circuit and a switching circuit. A power transfer unit is electrically connected to the switching circuit. A main shell seat has a first receiving slot, a second receiving slot and an insertion portion. A first conductive sheet is disposed in the first receiving slot. A second conductive sheet is disposed in the second receiving slot. A separation shell seat has a separation receiving slot and a sliding rail, and the separation shell seat is coupled to the main shell seat through the sliding rail inserting in the insertion portion, and a separation conductive sheet is disposed in the separation receiving slot.

Powered chairs, assemblies for use in the powered chairs, and components for use in the assemblies are provided. Electrical systems for use in the powered chairs, and components for use in the electrical systems are provided. Control systems and methods for operating powered chairs are also provided. Any given chair may be locally and/or remotely controlled.

Powered chairs, assemblies for use in the powered chairs, and components for use in the assemblies are provided. Electrical systems for use in the powered chairs, and components for use in the electrical systems are provided. Control systems and methods for operating powered chairs are also provided. Any given chair may be locally and/or remotely controlled.

A rotatable electric plug includes a plug housing including a sleeve body, a plug module including a mounting body and at least a protruding pin, and a limiting assembly coupled to the sleeve body and the mounting body. The mounting body is rotatably coupled in the sleeve body that a rotational movement of the mounting body is reversible. The mounting body has a first side and an opposed second side that a portion of the protruding pin is extended from the first side of the mounting body. The limiting assembly is arranged to block the plug module from rotating infinitely at the plug housing in one direction. The rotatable electric plug has the advantages of enabling the reversibly rotational movement of the plug module, enhancing the rotational movement of the plug module, retaining the plug module at an angular angle, and preventing the plug module from being infinitely rotated.

Powered chairs, assemblies for use in the powered chairs, and components for use in the assemblies are provided. Electrical systems for use in the powered chairs, and components for use in the electrical systems are provided. Control systems and methods for operating powered chairs are also provided. Any given chair may be locally and/or remotely controlled.

Powered chairs, assemblies for use in the powered chairs, and components for use in the assemblies are provided. Electrical systems for use in the powered chairs, and components for use in the electrical systems are provided. Control systems and methods for operating powered chairs are also provided. Any given chair may be locally and/or remotely controlled.

This invention relates generally to security covers for electrical appliances which are powered by mains electricity. More specifically it relates to security covers to operate the electrical appliances by authorised users locally or remotely via an authorisation device via a network such as the internet. The security cover houses a switch and includes an authorisation device for enabling an authorised person to control a power supply, via the switch, to an electrical device or appliance. The security cover has an input means adapted to receive an authorisation signal; the switch is operative in response to the authorisation signal and a command signal in order to connect and disconnect the power supply to the device or appliance.