In a data processing device according to yet another embodiment of the invention, the first connector unit and the second connector unit incorporate a rotation prevention mechanism preventing a pivot unit from rotating more than {HEAD ~ a predetermined angle} of {TAIL ~ rotation} 
of
In a data processing device according to yet another embodiment of the invention , the first connector unit and the second connector unit incorporate a rotation prevention mechanism preventing a pivot unit from rotating more than { HEAD ~ a predetermined angle } of { TAIL ~ rotation }
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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL