Abstract: Disclosed is a mobile socket device that can be quickly fixed and disassembled, including a socket and a fixed socket. The socket has a placement surface provided with a clamp hole, and at least one power collecting surface each provided with at least one set of jacks. The fixed seat has a receiving surface provided with a buckle buckled with the clamp hole, and a mounting surface suitable for being mounted to a carrier. The mobile socket device takes into account the advantages of both a fixed socket and a mobile socket. On the one hand, the socket can be fixed in any place at any time through the fixed socket. On the other hand, the socket can be removed from the fixed seat and used as a mobile socket. In addition, the socket and the fixed seat are connected by buckle connection, facilitating mounting and disassembly.

Abstract: Provided is a smart matching step-down circuit, comprising an alternating current input terminal (10), a rectifier filter circuit (20), a switching circuit (30), a high voltage BUCK control step-down circuit (40), a floating zero potential control circuit (41), a voltage detection and feedback circuit (50), a PWM controller (52), a full-bridge DC/AC converter circuit (60), an alternating current output terminal (70), an output voltage detection circuit (62), and a conversion controller (80); the high voltage BUCK control step-down circuit comprises a step-down inductor (L1) and a step-down capacitor (C18); the first end of the step-down inductor is connected to the output terminal of the switching circuit; the second end of the step-down inductor is connected to the positive electrode of the step-down filter capacitor, and is used for stepping down and filtering the pulse voltage, then outputting a second current; the floating zero potential control circuit comprises a flyback diode (D11, D12); the cathode of