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