{HEAD ~ One end} of the second axle is pivotally inserted into {TAIL ~ the second housing}, the intermediate portion of the second axle is non pivotally fixed to the second aperture, and the other end of the second axle is pivotally inserted into the counter aperture formed in the second supporting member 
is pivotally inserted into
{ HEAD ~ One end } of the second axle is pivotally inserted into { TAIL ~ the second housing } , the intermediate portion of the second axle is non pivotally fixed to the second aperture , and the other end of the second axle is pivotally inserted into the counter aperture formed in the second supporting member
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL 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 OTH OTH OTH OTH OTH OTH