US Patent 7465187 Switchable cable device

A switchable cable device suitable for connecting between an electronic device and an external peripheral device for signal transmission is disclosed. The switchable cable device comprises a cable having a connection at a side for electrically connecting to the electronic device and at least two branches disposed on another side thereof. Each branch has a connector and at least one extensional connector. The extensional connectors and connectors have circuit boards and chips which can independently renew an activation program.