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