Patent ID: 8422237

Claim:
A folding structure comprising: A storage device ( 10 ) has both a substrate ( 11 ) with an inner surface ( 111 ) on which an electronic component ( 13 ) at least and a plurality of contact pieces ( 14 ) electrically connected each other via the substrate ( 11 ) are installed and an electronics body ( 12 ) encasing the electronic component ( 13 ) wherein the electronics body ( 12 ) has an outer surface ( 121 ) with a plurality of metal contacts ( 15 ) provided and electrically connected to the substrate ( 11 ) and the electronic component ( 13 ) is installed to partially correspond to the metal contacts ( 15 ) for the storage device's space effectively used and saved; A plug board ( 20 ) has its outer surface ( 201 ) with a plurality of metal contacts ( 21 ) provided and is coupled to one side of the storage device ( 10 ) wherein the metal contacts ( 21 ) on the plug board ( 20 ) are electrically connected to the contact pieces ( 14 ); wherein the metal contacts ( 21 ) on the plug board ( 20 ) combine with metal contacts ( 15 ) on an outer surface ( 121 ) of the electronics body ( 12 ) for compatibility of the Universal Serial Bus (USB) data transfer interfaces.