Transmission cable for electrical devices

A transmission cable for an electrical device, comprising:

• a first case;
• a second case detachably connected to the first case, wherein a space is formed between the first case and the second case when the first case is connected to the second case;
• a line having opposite ends connected to the first case and the second case respectively;
• a first connector includes a plug, a circuit board, and a transformer;
• the first connector connected to the end of the line connected to the first case;
• the plug and the transformer are electrically connected to the circuit board respectively;
• a second connector connected to the end of the line connected to the second case;
• wherein both the first connector and the second connector are received in the space between the first case and the second case when the first case is connected to the second case;
• the first case has an outer member and an inner member, wherein the outer member is connected to the inner member to form a chamber therebetween;
• the end of the line connected to the first case is received in the chamber, and the first connector is connected to the inner member;
• and
• the plug is pivoted on an outer side of the inner member, and the circuit board and the transformer are received in the chamber of the first case.