Peripheral with pivotal turn-over guide mechanism

A peripheral with a pivotal turn-over guiding mechanism, the peripheral comprising:

• a transporting mechanism;
• a first passage;
• an image processing unit disposed on the first passage;
• a second passage connected with the first passage, wherein the image processing unit performs a first image process on a first side of a medium, and then the transporting mechanism transports the medium to the second passage;
• a third passage connected with the first passage and the second passage, wherein the transporting mechanism transports the medium, which has encountered the first image process, partially out of and back into the second passage, into the third passage, and then into the first passage from the third passage, so that the image processing unit performs a second image process on a second side of the medium, wherein the second passage comprises:
• a bidirectional passage connected with the first passage, the third passage and an output tray, wherein the transporting mechanism transports the medium past the bidirectional passage in a forward direction and in a reverse direction;
• and a unidirectional passage connected with the first passage, the third passage and the output tray, wherein the transporting mechanism transports the medium past the unidirectional passage in the forward direction;
• a guide member, which is rotatably disposed at a connection portion of the third passage, the second passage and the first passage, normally closes a forward path from the first passage to the second passage, and normally opens a reverse path from the second passage to the third passage, wherein the medium coming from the first passage pushes the guide member to open the forward path, and the medium coming from the second passage is guided into the third passage by the guide member without entering the first passage;
• and
• a switching gate, which is disposed between the bidirectional passage and the unidirectional passage, and switches between a first state and a second state, wherein:
• in the first state, the medium enters the bidirectional passage from the first passage, and enters the third passage from the bidirectional passage;
• and
• in the second state, the medium enters the unidirectional passage from the first passage.