When the operating unit is at a stored position, {HEAD ~ the second shafts} of {TAIL ~ the operating unit} is moved from the front side of a mobile phone to the back side thereof, so that the operating unit is closely attached to the back surface of the mobile phone 
When the operating unit is at a stored position , { HEAD ~ the second shafts } of { TAIL ~ the operating unit } is moved from the front side of a mobile phone to the back side thereof , so that the operating unit is closely attached to the back surface of the mobile phone
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH