An object of the invention is to provide a locking mechanism which allows {HEAD ~ a cover} to be opened by {TAIL ~ one hand} 
to be opened by
An object of the invention is to provide a locking mechanism which allows { HEAD ~ a cover } to be opened by { TAIL ~ one hand }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL