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