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