According to a first aspect, {HEAD ~ the biasing spring} is fixed to {TAIL ~ a supporting member} by a plate like spring fixing member to form a unit assembly 
is fixed to
According to a first aspect , { HEAD ~ the biasing spring } is fixed to { TAIL ~ a supporting member } by a plate like spring fixing member to form a unit assembly
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH