Coil springs are connected between the casing and lid member of pivotally urging the latter to a neutral pivoted position in which {HEAD ~ the plate portion} is centered between the projecting edge portions and bodily urging the lid member, in its neutral pivoted position, toward the straight side of the peripheral wall of {TAIL ~ the casing} 
Coil springs are connected between the casing and lid member of pivotally urging the latter to a neutral pivoted position in which { HEAD ~ the plate portion } is centered between the projecting edge portions and bodily urging the lid member , in its neutral pivoted position , toward the straight side of the peripheral wall of { TAIL ~ the casing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL