Further, at least one embodiment provides an assist mechanism that includes a pressing device, a stopper mechanism, an engagement member, {TAIL ~ a catch portion}, and {HEAD ~ a release member} 
Further , at least one embodiment provides an assist mechanism that includes a pressing device , a stopper mechanism , an engagement member , { TAIL ~ a catch portion } , and { HEAD ~ a release member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD