Abstract: The present disclosure relates to electronic equipment, and especially relates to an alternating current transmission circuit. The alternating current transmission circuit includes power supply circuit and a switch circuit coupled with the power supply circuit. The switch circuit includes a main control circuit, a surge detection circuit, and a first switch device connected in series in the power supply circuit. The main control circuit is signal connected with the first switch device and configured to control on-off of the power supply circuit by controlling the first switch device. An input terminal of the surge detection circuit is connected with the power supply circuit, and an output terminal of the surge detection circuit is connected with the main control circuit.

Abstract: A retractable data cable assembly is provided, which includes a cable, a winding assembly, a movable assembly and a housing defining an accommodating cavity where the winding assembly and the movable assembly are arranged. The cable is wound around the winding assembly and exposed out of the housing. The winding assembly includes a winder rotatable with respect to the housing. The movable assembly is disposed on a side of the winder and positioned to connect to the housing. The movable assembly includes a transmission assembly and an auxiliary member respectively coupled with the winder and the transmission assembly. The auxiliary member produces elastic deformation to provide the transmission assembly with a preload force for swinging toward or away from the side of the auxiliary member. The storage of the retractable data cable assembly is more convenient.

Abstract: The present disclosure relates to electronic equipment, and especially relates to an alternating current transmission circuit. The alternating current transmission circuit includes power supply circuit and a switch circuit coupled with the power supply circuit. The switch circuit includes a main control circuit, a surge detection circuit, and a first switch device connected in series in the power supply circuit. The main control circuit is signal connected with the first switch device and configured to control on-off of the power supply circuit by controlling the first switch device. An input terminal of the surge detection circuit is connected with the power supply circuit, and an output terminal of the surge detection circuit is connected with the main control circuit.