Coil springs are connected between the casing and {HEAD ~ lid member} of pivotally urging {TAIL ~ the latter} to a neutral pivoted position in which 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 the casing 
Coil springs are connected between the casing and { HEAD ~ lid member } of pivotally urging { TAIL ~ the latter } to a neutral pivoted position in which 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 the casing
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH