Wire take-up device

A wire take-up device, comprising a shell having an internal chamber, wherein the internal chamber is correspondingly provided with a wire take-up mechanism and a power transmission mechanism;

• the wire take-up mechanism is configured to store a connecting wire in a wire take-up groove within the internal chamber, and the shell is correspondingly formed at a side surface with an opening portion allowing the connecting wire to freely extend and retract, the opening portion being configured to allow the connecting wire to be pulled outward to extend a usable range of the connecting wire;
• the power transmission mechanism comprises a movable plate member attached to the wire take-up mechanism, and a stationary plate member attached to the shell;
• and the movable plate member is rotatably in electrical contact with the stationary plate member, and the stationary plate member is provided with a plurality of connectors, the movable plate member is provided with at least one welding tray, and one end of the connecting wire is connected to the welding tray;
• and
• wherein each connector has a plurality of conductive contacts formed by correspondingly bending a metal sheet;
• and each conductive contact is in a shape of a spring arch, and is correspondingly pressed against the movable plate member to establish an electrical connection;
• wherein each conductive contact is composed of a horizontal segment and an arcuate segment, at least one arc-shaped bent portion and one hook-shaped pressing portion are provided on the arcuate segment, and a protruding rib portion with a thickened configuration is provided at least on the bent portion.