This is a classical bi stable bias spring arrangement in which the pivot pins and the anchors are laterally spaced apart , such that there is a more tensioned spring condition between the less tensioned spring conditions which occur when {HEAD ~ the latch plate} is in {TAIL ~ either} of its stable positions  
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This is a classical bi stable bias spring arrangement in which the pivot pins and the anchors are laterally spaced apart , such that there is a more tensioned spring condition between the less tensioned spring conditions which occur when { HEAD ~ the latch plate } is in { TAIL ~ either } of its stable positions
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH