{TAIL ~ An elastically engaged portion} 67a of {HEAD ~ the operating lever} 67 is elastically and selectively engaged with the U shaped engaging bar 62 of the base 1 
{ TAIL ~ An elastically engaged portion } 67a of { HEAD ~ the operating lever } 67 is elastically and selectively engaged with the U shaped engaging bar 62 of the base 1
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH