The release member releases a force pulling {TAIL ~ the retractable unit} when {HEAD ~ the retractable unit} is moved to the closed position 
The release member releases a force pulling { TAIL ~ the retractable unit } when { HEAD ~ the retractable unit } is moved to the closed position
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH