Forward and reverse universal USB (Universal Serial Bus) connecting device, connecting structure and electronic equipment

The invention relates to the field of electronic equipment, and provides a USB (Universal Serial Bus) connecting device and connecting structure capable of being used positively and negatively, and electronic equipment, the device comprises a main body, a contact assembly and a signal seat, the signal divides the inner cavity of the main body into a first sliding groove and a second sliding groove, and the openings of the first sliding groove and the second sliding groove face the connecting port; the contact assembly comprises a first sliding piece and a second sliding piece, the first sliding piece is arranged in the first sliding groove in a sliding mode, the second sliding piece is arranged in the second sliding groove in a sliding mode, the first sliding piece and the second sliding piece are connected through a linkage piece, and the linkage piece is used for enabling the first sliding piece and the second sliding piece to synchronously and reversely move. The linkage piece enables the first sliding pie