Patent ID: 7700876

Claim:
An external device that is electrically connected to a main unit by a plurality of electric cables, the external device comprising: a first casing member storing a function unit and provided with an outlet that guides a cable of the plurality of electric cables to a first space, a first guiding hole that guides the cable from an inside of the first space, and a holding cover including a second guiding hole that guides the cable, which is guided from the first space through the first guiding hole, back to the first space; an external cover covering and opposing to the first casing member and defining the first space between the first casing member and the external cover, the external cover being provided with a cable drawing hole opposing the second guiding hole, so that the cable is substantially linearly drawn outside from the cable drawing hole; and a holding member in the first space, the holding member being configured to hold the electric cables, wherein the electric cables are pulled out of the first casing member, bundled together, supported by the first casing member, and extended out of the external cover through the first space.