Abstract: An electronic apparatus such as a tape recorder includes a main body, an input and/or output block, and an attach/detach mechanism. The main body has a first terminal section. The input and/or output block has a second terminal section to be connected to the first terminal section and is detachably mounted on the main body. When the first terminal section is connected to the second terminal section, the input and/or output block is supplied with a signal from the main body through the first and the second terminal sections. The attach/detach mechanism detachably attaches the input and/or output block on the main body. The attach/detach mechanism has at least one engagement section provided on one of the main body and the input and/or output block, an engagable section provided on the other of the main body and the input and/or output block, so as to be engaged with the engagement section, and an urging mechanism for urging the engagement section to be engaged with the engagable section.

Abstract: A hand scanning type image input and output device includes a main body adapted to be moved by hand to scan an object, such as a manuscript, and having an enclosed readout head adapted to read out the information on a desired portion of the object via an opening formed on the surface of the main body which is tightly contacted with the object, a movable roll reciprocably supported on the surface of the main body in which the read-out opening is formed, and a travel guide section rotatably mounted to the main body. A mounting reference surface for the object is formed on the perimeter of the read-out opening and the movable roll is rotated in synchronism with a detecting unit adpated to detect the distance traversed by the main body.